CONCENTRA MANAGED CARE INC
PRER14A, 1999-07-16
SPECIALTY OUTPATIENT FACILITIES, NEC
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                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                            SCHEDULE 14A INFORMATION


Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934
                                (Amendment No. 4)
                               ------------------

Filed by Registrant        [X]
Filed by a Party other than the Registrant   [ ]
Check the appropriate box:
[X]  Preliminary Proxy Statement
[ ]  Confidential, for Use of the Commission Only (as permitted by Rule
     14a-6(e)(2))
[ ]  Definitive Proxy Statement
[ ]  Definitive Additional Materials
[ ]  Soliciting Material Pursuant to (beta)240.14a-11(c) or (beta)240.14a-12


                          Concentra Managed Care, Inc.
                (Name of Registrant as Specified in its Charter)


                 ----------------------------------------------
        (Name of Person Filing Proxy Statement if other than Registrant)


Payment of Filing Fee (Check the appropriate box): No fee required.
[ ] Fee computed on table below per Exchange Act Rules 14a-6(i) and 0-11.

   (1) Title of each class of securities to which the transaction applies:
       Common Stock ("Concentra Common Stock"), par value $0.01 per share, of
       Concentra Managed Care, Inc. (the "Company").

   (2) Aggregate number of securities to which transaction applies: (i)
       47,294,074 shares of Concentra Common Stock and (ii) vested
       "in-the-money" options to purchase 1,212,945 shares of Concentra Common
       Stock.

   (3) Per unit price or other underlying value of transaction computed pursuant
       to Exchange Act Rule 0-11 (set forth the amount on which the filing fee
       is calculated and state how it was determined): $16.50 per share in
       cash-out merger plus the difference between $16.50 and the weighted
       average exercise price of $6.48 for each share subject to a vested "in
       the money" option.

   (4) Proposed maximum aggregate value of the transaction: 47,294,074 shares of
       Concentra Common Stock x $16.50 per share = $780,352,221 $12,153,708.90
       to be paid to option holders Total proposed maximum aggregate value of
       the transaction: $792,505,929.90

   (5) Total fee paid: $158,501.19 (wired to Mellon Bank, N.A. on March 29,
       1999).

[ ]    Fee paid previously with preliminary materials.
[ ]    Check box if any part of the fee is offset as provided  by  Exchange
       Act Rule 0-11(a)(2) and identify the filing for which the offsetting fee
       was paid previously. Identify the previous filing by registration
       statement number, or the Form or Schedule and the date of its filing.

================================================================================
<PAGE>

                          CONCENTRA MANAGED CARE, INC.
                                 312 Union Wharf
                           Boston, Massachusetts 02109

                                                         ________________, 1999
Dear Stockholders:

     You are cordially  invited to attend a Special  Meeting of  Stockholders of
Concentra Managed Care, Inc. to be held on  _____________,  1999, at 10:00 a.m.,
local time, at ___________________ _________________________. The purpose of the
special  meeting is for you to vote upon a merger  that,  if  consummated,  will
result in you  receiving  $16.50 in cash per share for your shares of  Concentra
common stock, subject to your appraisal rights under Delaware law.

     If you  approve  the  merger,  Yankee  Acquisition  Corp.,  a newly  formed
Delaware  corporation,  will be merged with and into  Concentra  with  Concentra
being the surviving corporation in the merger. Yankee was created only to engage
in the  merger  and was  organized  and is  currently  owned by  Welsh,  Carson,
Anderson & Stowe VIII,  L.P.  Welsh,  Carson,  Anderson & Stowe VIII,  L.P. owns
14.97%  of  Concentra's   common  stock.   Its  affiliate  was  an  investor  in
OccuSystems, Inc., which merged with CRA Managed Care, Inc. to form Concentra in
1997.  Affiliates of Ferrer Freeman  Thompson & Co., LLC have agreed to purchase
about 7.0% of Yankee's capital stock prior to the merger.

     Concentra's Board of Directors formed a special committee consisting of two
independent  directors  to  evaluate  the  merger.  The  special  committee  has
unanimously  recommended to the Board that the merger be approved. In connection
with the merger, BT Alex. Brown  Incorporated,  Concentra's  financial  advisor,
delivered to the Board and the special  committee an opinion as to the fairness,
from a financial  point of view, of the merger  consideration  to the holders of
Concentra common stock, other than Welsh, Carson, Anderson & Stowe VIII, L.P. or
its  affiliates.  The written  opinion of BT Alex.  Brown dated March 2, 1999 is
attached as Appendix B to the enclosed proxy  statement,  and you should read it
carefully in its entirety.

     The  approval  and  determination  of the board  were  based on a number of
factors including the recommendation of the special committee, the opinion of BT
Alex.  Brown and the other factors and negative  aspects of the merger agreement
that are described in "Special  Factors--The Special Committee's and the Board's
Recommendation" in the enclosed proxy statement.

     The board has  determined  that the merger is advisable and fair to you and
in your best interest. The board therefore recommends that you approve and adopt
the merger agreement.

     We cannot  complete  the merger  unless the  stockholders  approve  it. The
accompanying  proxy statement  provides detailed  information about the proposed
merger, and it includes a copy of the merger agreement attached as Appendix A.

     Please give all of this information your careful attention. Approval of the
merger at the special meeting will require the  affirmative  vote of the holders
of a majority of the  outstanding  shares of Concentra  common stock entitled to
vote at the  special  meeting.  [WCAS  has  agreed  to vote,  and to  cause  its
affiliates to vote, all shares of Concentra common stock owned by WCAS or any of
its affiliates for and against the merger  agreement in the same proportion that
the public  stockholders  of  Concentra  vote their  shares for and  against the
merger agreement.]  Whether or not you plan to attend, it is important that your
shares are represented at the special meeting. A failure to vote will count as a
vote against the merger.  Accordingly,  you are requested to promptly  complete,
sign and date the enclosed proxy card and return it in the envelope  provided or
vote by telephone or through the Internet as detailed in the form of Concentra's
proxy attached hereto,  whether or not you plan to attend. This will not prevent
you from voting your shares in person if you later  choose to attend the special
meeting.  If the  merger  is  approved  by the  stockholders,  you will  receive
instructions for surrendering your Concentra share  certificates and a letter of
transmittal  to be used for this  purpose.  You  should  not  submit  your share
certificates  for  exchange  until you have  received the  instructions  and the
letter of transmittal.

      Sincerely,

      Daniel J. Thomas
      President and Chief Executive
      Officer

This proxy statement is dated  _____________,  1999 and is first being mailed to
Concentra stockholders on or about _____________,  1999.


<PAGE>
                          CONCENTRA MANAGED CARE, INC.
                                 312 UNION WHARF
                           BOSTON, MASSACHUSETTS 02109
                                 617/367-2163

                    NOTICE OF SPECIAL MEETING OF STOCKHOLDERS

                        TO BE HELD ON _____________, 1999

To the Stockholders of Concentra Managed Care, Inc.:

     This is a notice  that a  Special  Meeting  of  Stockholders  of  Concentra
Managed Care, Inc., a Delaware corporation,  will be held on __________, 1999 at
10:00 a.m.,  local time,  at  ____________________________.  The purpose of this
meeting is for you to:

     1.  Consider  and vote upon a proposal  to approve and adopt an Amended and
     Restated Agreement and Plan of Merger, dated as of March 24, 1999. Pursuant
     to the merger agreement,  Yankee Acquisition Corp., a newly formed Delaware
     corporation, will be merged with and into Concentra. Each outstanding share
     of  Concentra  common  stock  will be  converted  into the right to receive
     $16.50 in cash,  without  interest,  other than  shares  held by  Concentra
     stockholders  who are  entitled  to and have  perfected  their  dissenters'
     appraisal rights. Shares held by Concentra, its subsidiaries, and Yankee or
     its  affiliates  will be  canceled  in the  merger.  A copy  of the  merger
     agreement  is  attached  as  Appendix  A  to,  and  is  described  in,  the
     accompanying proxy statement.

     2.  Consider and act upon any other matters as may properly come before the
     special  meeting  or any  adjournments  or  postponements  of  the  special
     meeting.


     Concentra's  Board of Directors has determined  that only holders of shares
of  Concentra  common stock at the close of business on  _______________,  1999,
will be  entitled  to notice  of,  and to vote at,  the  special  meeting or any
adjournments  or  postponements  of the special  meeting.  A form of proxy and a
proxy statement containing more detailed information with respect to the matters
to be  considered  at the  special  meeting  accompany  and  form a part of this
notice.


                                             By order of the Board of Directors,

                                             ------------------------------
                                             Richard A. Parr II
                                             Executive Vice President,
                                             General Counsel and
                                             Corporate Secretary

Boston, Massachusetts

__________, 1999                         _______________________

<PAGE>

     WHETHER OR NOT YOU ARE ABLE TO ATTEND THE  SPECIAL  MEETING,  PLEASE  SIGN,
DATE AND RETURN THE  ACCOMPANYING  PROXY CARD PROMPTLY IN THE ENCLOSED  ENVELOPE
WHICH  REQUIRES  NO POSTAGE IF MAILED IN THE  UNITED  STATES.  YOU MAY ALSO VOTE
TELEPHONICALLY BY TOUCH-TONE  TELEPHONE OR THROUGH THE INTERNET BY FOLLOWING THE
INSTRUCTIONS   CONTAINED  ON  YOUR  PROXY  CARD.  PLEASE  DO  NOT  SEND  IN  ANY
CERTIFICATES FOR YOUR SHARES AT THIS TIME.

     THE MERGER HAS NOT BEEN  APPROVED  OR  DISAPPROVED  BY THE  SECURITIES  AND
EXCHANGE  COMMISSION,  NOR HAS THE COMMISSION PASSED UPON THE FAIRNESS OR MERITS
OF THE MERGER OR UPON THE ACCURACY OR ADEQUACY OF THE  INFORMATION  CONTAINED IN
THIS DOCUMENT. ANY REPRESENTATION TO THE CONTRARY IS UNLAWFUL.

     You have the right to dissent from the merger and to receive payment of the
"fair value" of your shares.  To do so, you must comply with the  procedures set
forth in Section 262 of the  Delaware  General  Corporation  Law. See "Rights of
Dissenting Stockholders" in the proxy statement that accompanies this notice and
the full text of Section 262 of the Delaware  General  Corporation Law, which is
attached as Appendix C and is described in the accompanying proxy statement.


<PAGE>

<TABLE>
<CAPTION>
TABLE OF CONTENTS
                                                                                 Page
<S>                                                                                <C>
QUESTIONS AND ANSWERS ABOUT THE MERGER .........................................    1
SUMMARY ........................................................................    4
     The Companies .............................................................    4
     The Special Meeting .......................................................    4
     Record Date; Voting Power .................................................    4
     Voting Procedures .........................................................    5
     Recommendations ...........................................................    5
     Opinion of Concentra's Financial Advisor ..................................    5
     Terms of the Merger Agreement .............................................    5
     Accounting Treatment ......................................................    7
     Interests that Differ from Your Interests .................................    7
     Regulatory Approvals ......................................................    8
     Dissenters' Appraisal Rights ..............................................    8
     Historical Market Information .............................................    8
     Selected Consolidated Financial Data ......................................   10
     Certain Projections .......................................................   18
     CAUTIONARY STATEMENT CONCERNING FORWARD-LOOKING INFORMATION ...............   19
SPECIAL FACTORS ................................................................   19
     Background of the Merger ..................................................   19
     The Special Committee's and the Board's Recommendation ....................   27
     Opinion of Concentra's Financial Advisor ..................................   31
     Purpose and Reasons of WCAS and the Members of Management for the Merger ..   38
     Position of WCAS and the Members of Management as to Fairness of the Merger   39
     Interests of Certain Persons in the Merger ................................   40
     Certain Benefits and Detriments of the Merger .............................   43
     Financing of the Merger ...................................................   45
     Conduct of Concentra's Business After the Merger ..........................   47
     Material Federal Income Tax Consequences ..................................   48
THE SPECIAL MEETING ............................................................   50
     Date, Time and Place of the Special Meeting ...............................   50
     Matters to be Considered at the Special Meeting ...........................   50
     Proxy Solicitation ........................................................   50
     Record Date and Quorum Requirement ........................................   50
     Voting Procedures .........................................................   51
     Voting and Revocation of Proxies ..........................................   53
     Effective Time of the Merger and Payment for Shares .......................   53
     Other Matters to Be Considered ............................................   53
THE MERGER .....................................................................   54
     General Description .......................................................   54
     Certain Terms of the Merger Agreement .....................................   54
     Anticipated Accounting Treatment ..........................................   66

                                       i
<PAGE>

     Governmental Approvals ....................................................   66
     Litigation Relating to the Merger .........................................   67
     Estimated Fees and Expenses of the Merger .................................   67
RIGHTS OF DISSENTING STOCKHOLDERS ..............................................   68
PRINCIPAL STOCKHOLDERS AND STOCK OWNERSHIP OF
MANAGEMENT AND OTHERS ..........................................................   71
CERTAIN INFORMATION CONCERNING CONCENTRA .......................................   72
CERTAIN INFORMATION CONCERNING YANKEE ..........................................   74
     Yankee ....................................................................   74
     Equity Investors ..........................................................   74
PURCHASES OF COMMON STOCK BY CERTAIN PERSONS ...................................   77
INDEPENDENT AUDITORS ...........................................................   79
STOCKHOLDER PROPOSALS ..........................................................   79
OTHER MATTERS ..................................................................   79
WHERE YOU CAN FIND MORE INFORMATION ............................................   79
INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE ................................   80
</TABLE>

Appendices:
A --  Merger Agreement
B --  Opinion of BT Alex. Brown Incorporated
C --  Section 262 of the Delaware General Corporation Law
99.1 Form of Concentra's Proxy

                                       ii

<PAGE>



                          CONCENTRA MANAGED CARE, INC.
                                312 UNION WHARF
                          BOSTON, MASSACHUSETTS 02109
                                  617/367-2163
                      -------------------------------------

                                 PROXYSTATEMENT
                     For the Special Meeting of Stockholders

                        To Be Held On _____________, 1999


                     QUESTIONS AND ANSWERS ABOUT THE MERGER

Q: What will happen in the merger?


A:  In the merger,  Yankee will be merged with and into Concentra with Concentra
    being the surviving  corporation.  If you are a stockholder  of Concentra at
    the time of the merger,  you will  receive a $16.50 cash payment for each of
    your outstanding  shares of Concentra common stock,  unless you exercise and
    perfect your dissenters'  appraisal  rights.  Shares held by Concentra,  its
    subsidiaries, Yankee or its affiliates will be canceled in the merger. After
    the merger,  Concentra will be owned by the  stockholders  of Yankee and you
    will no longer own stock in Concentra. To review the structure of the merger
    in greater detail, see pages 49 through 62.

Q: What will I receive in the merger?

A:  You  will  receive  $16.50  in cash,  without  interest,  for each  share of
    Concentra common stock that you own. This is the "merger consideration." For
    example:  If you own 100 shares of Concentra  common stock, you will receive
    $1,650.00 in cash upon completion of the merger.

Q: Why is Concentra being merged?

A:  Concentra's  board of  directors  believes  that the  merger of Yankee  into
    Concentra  and the $16.50  per share you will  receive in the merger is fair
    and is in your  best  interest.  The  board  made  the  determination  after
    exploring  strategic  alternatives  and a number of third party proposals to
    acquire  Concentra.  To review the  background and reasons for the merger in
    greater detail, see pages 19 through 31.

Q: Why was the special committee formed?

A:  Because certain of Concentra's directors had potential conflicts of interest
    in  evaluating  a number  of  third-party  proposals  to  acquire  Concentra
    (including  the  merger),   the  board  appointed  a  special  committee  of
    disinterested  directors to review and evaluate the  proposals.  At the time
    the special committee was formed,  the board believed that seven of the nine
    directors had  potential  conflicts of interest.  The special  committee has
    determined that the merger is fair to you and in your best interest.

Q: When do you expect the merger to be completed?

A: We are working to complete the merger during the month of August 1999.

                                       1
<PAGE>

Q: What are the tax consequences of the merger to me?

A:  Your receipt of the merger  consideration will be a taxable  transaction for
    federal income tax purposes.  To review the federal income tax  consequences
    to you in greater detail,  see page 45. Your tax consequences will depend on
    your  personal  situation.  You should  consult your tax advisors for a full
    understanding of the tax consequences of the merger to you.

Q: What am I being asked to vote upon?

A:  You are  being  asked to  approve  and  adopt the  merger  agreement,  which
    provides for the merger of Yankee into Concentra.

    The  special  committee  has  unanimously  approved  and  adopted the merger
    agreement.  The  board has  unanimously  approved  and  adopted  the  merger
    agreement. Accordingly, the special committee and the board recommend voting
    FOR the approval and adoption of the merger agreement.

Q: What do I need to do now?

A:  Simply  indicate on your proxy card how you want to vote and sign,  date and
    mail it in the enclosed  envelope as soon as  possible,  so that your shares
    will be represented at the special meeting. You may also vote telephonically
    or through the Internet by following  the  instructions  on your proxy card.
    Approval of the merger  requires  the  affirmative  vote of the holders of a
    majority of the  outstanding  shares of Concentra  common stock  entitled to
    vote on the proposal.

Q: What happens if I don't return a proxy card?

A:  The  failure to return  your proxy card will have the same  effect as voting
    against the merger.

Q: May I vote in person?

A:  Yes.  You may attend the  special  meeting  and vote your  shares in person,
    rather than signing and mailing your proxy card or voting  telephonically or
    through the Internet.

Q: May I change my vote after I have voted?

A:  Yes.  You may change your vote at any time before your proxy is voted at the
    special  meeting by following  the  instructions  as detailed in "Voting and
    Revocation  of  Proxies"  on page 48.  Before  your proxy is voted,  you may
    submit a new proxy or you may attend the special meeting and vote in person.

Q:  If my shares are held in "street name" by my broker,  will my broker vote my
    shares for me?

A:  Your  broker  will vote your  shares of  common  stock  only if you  provide
    instructions  on how to vote.  You should  instruct  your broker how to vote
    your shares,  following the directions your broker  provides.  If you do not
    provide  instructions to your broker, your shares will not be voted and they
    will be counted  as votes  against  the  proposal  to approve  and adopt the
    merger agreement.


                                       2
<PAGE>

Q: Should I send in my stock certificates now?

A:  No.  After  the  merger  is  completed,  Concentra  will  send  you  written
    instructions for exchanging your Concentra common stock certificates for the
    merger consideration.

Q: Who can help answer my questions?

A: If you have additional questions about the merger, you should contact:

          Richard A. Parr II
            General Counsel
     Concentra Managed Care, Inc.
          5080 Spectrum Drive
         Suite 400, West Tower
         Addison, Texas 75001
        Telephone: 972/364-8043
                  or
       Georgeson & Company Inc.
 the proxy solicitor who may be called
     toll-free at 1-800-223-2064.



                                       3
<PAGE>


                                    SUMMARY

     This summary highlights selected information from this document and may not
contain all of the  information  that is important  to you. For a more  complete
understanding  of the merger and for a more  complete  description  of the legal
terms of the merger,  you should read  carefully  this entire  document  and the
other available information referred to in "Where You Can Find More Information"
on page 74.

The Companies

Concentra Managed Care, Inc.
312 Union Wharf
Boston, Massachusetts 02109
617/367-2163

     Concentra  is the  leading  provider  of  healthcare  management  and  cost
containment services to the workers' compensation, disability and auto insurance
markets.  Concentra  also provides  out-of-network  medical claims review to the
group health marketplace and performs  non-injury services for over 80,000 local
employers.

Yankee  Acquisition Corp. Inc.
c/o Welsh,  Carson,  Anderson
& Stowe
320 Park Avenue, Suite 2500
New York, New York 10022-6815
212/893-4500

     Yankee was organized and is currently  owned by Welsh,  Carson,  Anderson &
Stowe VIII, L.P. Affiliates of Ferrer Freeman Thompson & Co., LLC have agreed to
acquire  about 7.0% of Yankee's  outstanding  capital stock prior to the merger.
Both Welsh Carson and Ferrer Freeman are private investment funds. Chase Capital
Partners, affiliates of Donaldson, Lufkin & Jenrette Securities Corporation, and
some  members  of  management  have  agreed  to  acquire  about  5% of  Yankee's
outstanding capital stock prior to the merger.  Yankee was created only to enter
into the merger agreement and to complete the merger and related transactions.

The Special Meeting

     The special meeting will be held on ___________, 1999, at 10:00 a.m., local
time, at  ________________  _____________________.  At the special meeting,  you
will be asked to  consider  and vote upon a proposal  to  approve  and adopt the
merger agreement.

Record Date; Voting Power

     Holders of record of  Concentra  common  stock at the close of  business on
______________,  1999  are  entitled  to  notice  of and to vote at the  special
meeting. As of that date,

                                       4
<PAGE>


there were _____ shares of Concentra  common stock issued and outstanding
held by approximately ____ holders of record. If you held Concentra common stock
on the record  date,  you are  entitled to one vote per share on any matter that
may properly come before the special meeting.

Voting Procedures

     Approval by the Concentra common  stockholders of the merger agreement will
require the  affirmative  vote of the  holders of a majority of the  outstanding
shares of  Concentra  common  stock  including  shares  voted by Welsh,  Carson,
Anderson & Stowe VIII,  L.P.  ("WCAS") and  Concentra's  directors and officers.
Approval of the merger  agreement does not require the approval of a majority of
unaffiliated stockholders.  WCAS has agreed to vote, and to cause its affiliates
to vote,  all  shares  of  Concentra  common  stock  owned by WCAS or any of its
affiliates for and against the merger  agreement in the same proportion that the
public  stockholders  of Concentra  vote their shares for and against the merger
agreement.

Recommendations

     Because certain of Concentra's  directors had actual or potential conflicts
of interest in evaluating a number of third-party proposals to acquire Concentra
(including the merger),  the board appointed the special committee to review and
evaluate the proposals.  The special  committee  unanimously  recommended to the
board  that  the  merger   agreement  be  approved.   Following   the  unanimous
recommendation of the special  committee,  the board determined that the merger,
the merger  agreement and the transactions  contemplated  thereby were advisable
and fair to you and in your best interest.  The special  committee and the board
recommend that you vote "For" the approval and adoption of the merger agreement.
You also should  refer to the reasons that the special  committee  and the board
considered  in  determining  whether to approve  and adopt the merger  agreement
beginning on pages 27 through 31.

Opinion Of Concentra's Financial  Advisor

     The board and special  committee  have  received an opinion of  Concentra's
financial  advisor,  BT Alex. Brown  Incorporated (now merged with Deutsche Bank
Securities  Inc., and known as Deutsche Bank Alex.  Brown),  as to the fairness,
from a financial  point of view, of the merger  consideration  to the holders of
Concentra common stock, other than WCAS or its affiliates.  The full text of the
written opinion of BT Alex. Brown  Incorporated  dated March 2, 1999 is attached
to this proxy  statement  as Appendix B, and you should read it carefully in its
entirety. The opinion of BTAlex. Brown Incorporated is directed to the board and
special  committee and does not constitute a recommendation to you as to how you
should vote with respect to matters relating to the proposed merger.

Terms of The Merger  Agreement

     The merger agreement is attached to this proxy statement as Appendix A. You
should read the merger agreement in its entirety.  It is the legal document that
governs the merger.

                                       5
<PAGE>

     General.  The merger agreement provides that Yankee will be merged with and
into Concentra,  with Concentra being the surviving corporation.  As a result of
the merger,  you will receive $16.50 in cash for each share of Concentra  common
stock that you own, unless you exercise and perfect your  dissenters'  appraisal
rights.  Shares held by Concentra,  its  subsidiaries,  Yankee or its affiliates
will be canceled in the merger.

     Conditions to the Merger.  The  completion  of the merger  depends upon the
satisfaction of a number of conditions, including:

     o the continued accuracy of each party's representations and warranties and
       the  fulfillment  of  each  party's  promises  contained  in  the  merger
       agreement;

     o the  adoption  of the merger  agreement  by the  affirmative  vote of the
       holders of a  majority  of the  outstanding  shares of  Concentra  common
       stock;

     o the  absence  of any order or  regulation  of any  court or  governmental
       entity preventing or prohibiting the merger;

     o the receipt of necessary  governmental  approvals and the  termination or
       expiration of any applicable regulatory waiting periods;

     o Yankee's receipt of financing to consummate the merger; and o the board's
       receipt from a valuation firm of a solvency letter addressed to the board
       as to the solvency of the  surviving  corporation  after giving effect to
       the merger and Yankee's contemplated merger financing arrangements.

     Each party may, at its option,  waive the  satisfaction of any condition to
such party's obligations under the merger agreement.  Concentra currently has no
intention to waive any condition to its obligations  under the merger agreement.
In the event of any waiver by Concentra of a material condition under the merger
agreement,  the merger agreement will be amended and stockholder approval of the
merger  agreement,  including  the change  resulting  from the  waiver,  will be
obtained. Even if the stockholders approve the merger, there can be no assurance
that the merger will be consummated.

     Termination.  Either Concentra or Yankee may terminate the merger agreement
under certain circumstances, including if:

     o the merger has not been  completed by August 31, 1999,  provided that the
       delay is not due to a breach of any obligation under the merger agreement
       by the party seeking to terminate;

     o Concentra  fails to  obtain  the  required  stockholder  approval  at the
       special meeting; or

     o any court in the United States or other governmental  entity has issued a
       final and non-appealable  order or other action that in any way prohibits
       the merger.

                                       6
<PAGE>

     The merger agreement can be terminated under other  circumstances which are
described on page 59.

     Fees And Expenses.  Concentra  will be required to pay Yankee a termination
fee of $25.0 million and the expenses of Yankee up to $4.0 million if:

     o the merger  agreement is terminated  by Yankee in specific  circumstances
       involving  Concentra  entering into a business  transaction  with a third
       party;

     o the merger agreement is terminated by Concentra because in the good faith
       judgment  of  the  board,  as  advised  by  outside  counsel,  the  board
       determines  that  termination  is  required  because  of a third  party's
       acquisition proposal; or

     o the  merger  agreement  is  terminated  by Yankee  because  the board has
       withdrawn  or  modified,  in any way  materially  adverse to Yankee,  the
       board's recommendation or approval of the merger agreement.

Accounting  Treatment

     The merger  will be  accounted  for as a  recapitalization  for  accounting
purposes.   Accordingly,   the  historical  basis  of  Concentra's   assets  and
liabilities  will not be  affected by the  merger.  After the  recapitalization,
Ferrer Freeman will own an  approximate 7% interest in Concentra.  This interest
will be held in a  separate  class of common  stock  which is  identical  to the
original  common stock of  Concentra  except it will have the ability to elect a
member of the  board of  Concentra.  Ferrer  Freeman  has no formal or  informal
rights to approve or veto transactions. The rights granted to Ferrer Freeman are
protective rights rather than participating  rights and, as such, Ferrer Freeman
and Welsh Carson  should not be construed as members of a  collaborative  group.

Interests That Differ From Your Interests

     Interests  Of  Concentra's  Management.   Certain  members  of  management,
including John K. Carlyle, W. Tom Fogarty,  M.D., James M. Greenwood,  Thomas E.
Kiraly, Kenneth Loffredo, Richard A. Parr II and Daniel J. Thomas (collectively,
the "Members of  Management"),  have  interests in the merger that are different
from,  or in addition  to,  yours as a Concentra  stockholder.  If the merger is
consummated,  Messrs.  Carlyle and Thomas will be  designated  as members of the
board of directors of Concentra and all of the Members of Management, other than
Mr. Carlyle,  will remain as senior management of Concentra  pursuant to amended
and restated  employment  agreements,  or with respect to Mr.  Kiraly an initial
employment  agreement,  that provide for severance  benefits if their employment
with  Concentra is  terminated  following  the merger and  employment  retention
incentives,  including  grants of options to acquire  common  stock of Concentra
following  the  merger.  The  Members  of  Management  will also  acquire  about
$________ of Yankee's outstanding common stock prior to the merger. In addition,
Members  of  Management  will  receive  a  maximum  aggregate  cash  payment  of
$7,530,000  for vested  options and  restricted  stock that they hold based on a
price of $16.50 per share of restricted  stock and the excess of


                                       7
<PAGE>

$16.50 over the exercise  price of the options.  Also,  Concentra  will continue
certain  indemnification  arrangements  and director's  and officer's  liability
insurance for existing directors and officers of Concentra after the merger.

     The  Special  Committee.  The  members  of the  special  committee  are not
Concentra   employees,   are  not  involved  as  participants  in  the  proposed
transaction and have no past or present  relationship  with WCAS, Ferrer Freeman
Thompson & Co., LLC or any of the other  parties who  delivered  expressions  of
interest in acquiring Concentra. Each member of the special committee received a
$25,000  fee for  serving on the  special  committee,  plus  $2,000 per  special
committee  meeting  attended in person and $1,000 per telephonic  meeting of the
special committee  attended.  Each member of the special committee also received
reimbursement of out-of-pocket  expenses  incurred in connection with service on
the special  committee.  The members of the special  committee  believe that the
foregoing  arrangements  do  not  affect  their  independence  or  impartiality.

Regulatory  Approvals

     Concentra is required to make filings with or obtain approvals from certain
regulatory  authorities  in  connection  with the  merger.  These  consents  and
approvals  include the termination or expiration of a waiting period with regard
to filings with the Federal Trade Commission and the Department of Justice under
the Hart-Scott-Rodino  Antitrust Improvements Act of 1976, as amended. On May 5,
1999,  the  Federal  Trade  Commission  granted  Concentra's  request  for early
termination  of  the  waiting  period  under  the  Hart-Scott-Rodino   Antitrust
Improvements  Act.

Dissenters'  Appraisal Rights

     If you do not vote in favor of the proposal to approve and adopt the merger
agreement and you comply strictly with the applicable  provisions of Section 262
of the Delaware  General  Corporation  Law, you have the right to dissent and be
paid cash for the "fair value" of your shares of Concentra  common  stock.  This
payment may be more than, the same as, or less than the merger  consideration of
$16.50 a share.  To perfect these  appraisal  rights with respect to the merger,
you must follow the required procedures precisely.  The applicable provisions of
Section 262 of the Delaware  General  Corporation Law are attached to this proxy
statement as Appendix C.

Historical Market Information

     Concentra  common stock is traded on the Nasdaq  National  Market under the
symbol "CCMC." The following table sets forth,  for the periods  indicated,  the
high and low sales prices per share as reported on Nasdaq.

                                               HIGH         LOW
                                            ----------   ----------
1997
FIRST QUARTER ............................   $28.00        $22.00
Second Quarter ...........................   $29.50        $17.25
Third Quarter ............................   $35.88        $27.50
Fourth Quarter ...........................   $38.50        $31.38

                                       8
<PAGE>

1998
First Quarter ............................   $35.50        $27.25
Second Quarter ...........................   $34.25        $22.00
Third Quarter ............................   $26.00        $ 5.63
Fourth Quarter ...........................   $12.50        $ 5.44
1999


First Quarter ............................   $14.68        $10.0625

     On March 2,  1999,  the  last  trading  day  prior to  announcement  of the
execution  of the merger  agreement,  the closing  price per share of  Concentra
common stock as reported on Nasdaq was $11.625.  On _________,  1999,  Concentra
common stock closed at $_______ per share. Concentra urges you to obtain current
market quotations before making any decision with respect to the merger.

     Since  its  inception,  Concentra  has not paid any cash  dividends  on its
common stock.  Under the merger  agreement,  Concentra has agreed not to pay any
dividends  on  Concentra  common  stock  prior  to the  closing  of the  merger.
Concentra's  revolving  credit  facility with its senior  lenders also prohibits
Concentra  from paying  dividends  and making other  distributions  on Concentra
common stock.


                                       9
<PAGE>



Selected Consolidated Financial Data

     The table below presents selected  consolidated  historical  financial data
that  has  been  derived  from  Concentra's   audited   consolidated   financial
statements.  You should read the selected  financial  data in  conjunction  with
Concentra's separate historical consolidated financial statements, related notes
and other  financial  information  incorporated  by  reference  into this  proxy
statement.

<TABLE>
<CAPTION>
                                                                                                  THREE MONTHS
                                                      YEAR ENDED DECEMBER 31,                    ENDED MARCH 31,
                                           ---------------------------------------------       ------------------
                                         1994       1995       1996        1997      1998       1998        1999
                                         ----       ----       ----        ----      ----       ----        ----
                                                            (IN THOUSANDS, EXCEPT PER SHARE DATA)
STATEMENT OF OPERATIONS:
<S>                                    <C>        <C>        <C>        <C>        <C>        <C>        <C>
Revenue .............................. $223,499   $305,355   $372,683   $489,318   $611,056   $144,282   $155,411
Gross profit .........................   37,093     62,435     82,755    116,679    141,759     34,384     31,674
Non-recurring charges ................       --        898        964     38,625    33,114      12,600        --
Operating income .....................   15,928     29,446     45,194     32,315     55,200      9,124     14,216
Income before taxes ..................   10,088     24,246     41,476     21,062     41,794      5,414     10,553
Provision for income taxes (1) .......    6,802      7,771     13,437     11,062     19,308      4,567      4,485
NET INCOME BEFORE
  EXTRAORDINARY ITEMS (1) ............    3,286     16,475     28,039     10,000     22,486        847      6,068
Basic earnings per share before
  extraordinary items ................               $0.48      $0.69      $0.23      $0.48      $0.02      $0.13
Basic weighted average shares
  outstanding ........................              33,810     40,411     42,774     46,451     44,939      47,251
Diluted earnings per share
  before extraordinary items .........               $0.46      $0.65      $0.22      $0.47      $0.02       $0.13
Diluted weighted average shares
outstanding ..........................              35,939     43,344     46,895     47,827     47,769      47,882
BALANCE SHEET:

Working capital ......................  $ 19,117  $ 21,971   $116,439   $ 36,754   $201,871   $171,808   $202,457
Total assets .........................   113,672   188,530    367,900    482,035    653,368    580,159    667,523
Total debt ...........................    83,785    34,639    142,229    206,600    327,925    298,381    327,900
Total stockholders' equity (deficit)..   (5,820)   109,383    178,146    206,441    239,875    205,068    247,652
</TABLE>

1) Prior to its  recapitalization  in March of 1994, CRA Managed Care,  Inc. had
   elected  to  be  taxed  as an  "S"  corporation.  In  connection  with  its
   recapitalization, CRA Managed Care, Inc. was required to change from an "S"
   to a "C"  corporation.  This  change  resulted in CRA  Managed  Care,  Inc.
   recording an  incremental  tax provision of $3,772,000 in the first quarter
   of 1994.  Concentra's  pro  forma  net  income  for 1994  would  have  been
   $3,446,000  higher had CRA Managed  Care,  Inc. been subject to federal and
   state  income taxes  during the entire  period based upon an effective  tax
   rate indicative of the statutory rate in effect during the period.


                                       10
<PAGE>
                          Concentra Managed Care, Inc.

            Consolidated Pro Forma Financial Statements (Unaudited)

     On March 2, 1999,  Concentra  entered into a definitive  agreement to merge
with  Yankee,  a  corporation  formed by WCAS which is a 14.97%  stockholder  of
Concentra.  Concentra's board of directors  unanimously approved the transaction
based  upon  the  recommendation  of  the  special  committee  of the  board  of
directors,   which  was  formed  on  October  1,  1998  to  evaluate   strategic
alternatives  in  response  to  several  unsolicited   expressions  of  interest
regarding the possible  acquisition of some or all of Concentra's  common stock.
On March 24, 1999,  Concentra entered into an amended and restated agreement and
plan of merger with Yankee. Pursuant to the amended merger agreement,  WCAS will
acquire  approximately  87%, funds managed by Ferrer Freeman Thompson & Co., LLC
will acquire  approximately  7% and other  investors,  Chase  Capital  Partners,
affiliates of Donaldson, Lufkin &Jenrette Securities Corporation and the Members
of Management will acquire  approximately 6% of the post-merger shares of common
stock of  Concentra  for  $16.50  per  share.  As a result of the  merger,  each
outstanding  share of Concentra common stock will be converted into the right to
receive $16.50 in cash.

     The transaction is valued at  approximately  $1,100,000,000,  including the
refinancing of $327,750,000 of the 6.0% and 4.5% convertible  subordinated notes
of  Concentra  that  contain  change  in  control   provisions  in  the  related
indentures.   The   transaction   is   structured  to  be  accounted  for  as  a
recapitalization  and is  expected  to be  completed  in  August  of  1999.  The
transaction  is  conditioned   upon,   among  other  things,   approval  of  the
stockholders of Concentra, receipt of financing and certain regulatory approvals
as more particularly described in this proxy statement.

     To finance the  acquisition  of Concentra,  WCAS will invest  approximately
$369,432,000 in equity financing, including the value of shares and convertibles
subordinated notes already owned by WCAS, and up to $110,000,000 in subordinated
indebtedness. Additionally, Ferrer Freeman will invest approximately $30,600,000
in equity and other investors, Chase Capital Partners,  affiliates of Donaldson,
Lufkin &Jenrette  Securities  Corporation,  and the Members of Management,  will
invest  approximately  $23,000,000 in equity. WCAS has also received commitments
from various lenders to provide financing of $190,000,000 in senior subordinated
notes,  $375,000,000 in term loans and a $100,000,000  revolving credit facility
to replace Concentra's existing senior credit facility. Additionally,  Concentra
would utilize  excess cash on hand at the time of the merger to help finance the
purchase of Concentra common stock.  Simultaneous with the right to receive cash
for shares, Yankee would merge with and into Concentra with Concentra surviving.

     The following  consolidated  pro forma financial  statements give effect to
the merger using the recapitalization method of accounting,  after giving effect
to the  pro  forma  adjustments  described  in  the  accompanying  notes.  These
unaudited   consolidated  pro  forma  financial   statements  are  not  required
disclosure in this proxy statement but they have been included for informational
purposes only to assist the reader in understanding the financial aspects of the
transaction.  The  current  stockholders  of  Concentra,  other than  WCAS,  its
affiliates  and the Members of  Management,  will have no  continuing  financial
interest in Concentra after the transaction. These


                                       11
<PAGE>

unaudited  consolidated pro forma financial  statements have been prepared from,
and should be read in  conjunction  with,  Concentra's  historical  consolidated
financial   statements  and  notes  thereto  filed  on  Form  10-K/A  which  are
incorporated by reference in this proxy statement.

     The  unaudited  Consolidated  Pro Forma  Balance Sheet as of March 31, 1999
gives  effect to the  merger  as if it had  occurred  on March 31,  1999 and the
Consolidated Pro Forma Statements of Operations for the three months ended March
31, 1999 and the year ended December 31, 1998 give effect to the merger as if it
had  occurred  on  January  1,  1999 and  January  1,  1998,  respectively.  The
Consolidated  Pro Forma  Financial  Statements  of  Concentra  do not purport to
present the  financial  position or results of  operations  of Concentra had the
merger  been  consummated  at the  dates  indicated,  nor are  they  necessarily
indicative  of future  operating  results or  financial  position  of the merged
companies.

     As a result of the  merger,  Concentra  will  incur  certain  deal fees and
financing  costs  of  approximately   $44,000,000.   These  costs  will  consist
principally  of  banking  and  professional  fees of  approximately  $17,500,000
associated  with the issuance of new debt which will be  capitalized as deferred
finance  costs  and  other  banking,   professional   and  transaction  fees  of
$26,500,000  associated with the merger, which will be expensed.  Concentra will
also  incur   approximately   $4,788,000   in  non-cash   charges  for  deferred
compensation  expense related to the accelerated vesting and issuance of 195,000
shares of  restricted  stock as a result of the merger.  In addition,  Concentra
expects to settle  vested  in-the-money  options which will result in a non-cash
compensation charge of approximately $12,400,000.  The expensed portion of these
fees and non-cash  compensation  expense and the related tax  benefit,  have not
been reflected on the  Consolidated  Pro Forma  Statements of Operations as they
are one-time and unusual in nature.


                                       12
<PAGE>



                          CONCENTRA MANAGED CARE, INC.

                      Consolidated Pro Forma Balance Sheets
                           March 31, 1999 (Unaudited)

<TABLE>
<CAPTION>
                                                                                 PRO FORMA
                                                            CONCENTRA           ADJUSTMENTS          PRO FORMA
                                                        ----------------        -----------         -----------
                        ASSETS
                        ------
CURRENT ASSETS:
<S>                                                        <C>                <C>                  <C>
  Cash and cash equivalents ...........................   $  92,753,000    $287,384,000 (1)      $  35,318,000
                                                                            675,000,000 (2)
                                                                           (298,250,000)(2)
                                                                           (677,569,000)(3)
                                                                            (44,000,000)(4)
  Marketable securities ...............................       5,003,000             --               5,003,000
  Accounts receivable, net ............................     137,272,000             --             137,272,000
  Prepaid expenses, tax assets and other current assets      36,109,000        4,227,000(5)         40,336,000
                                                          -------------    -------------         -------------
          Total current assets ........................     271,137,000      (53,208,000)          217,929,000
NET PROPERTY AND EQUIPMENT ............................      89,048,000             --              89,048,000
GOODWILL AND OTHER INTANGIBLE
  ASSETS, NET .........................................     285,971,000             --             285,971,000
MARKETABLE SECURITIES .................................      10,542,000             --              10,542,000
OTHER ASSETS ..........................................      15,280,000      (7,093,000)(2)         25,687,000
                                                                             17,500,000 (2)
                                                          -------------    -------------         -------------
                                                          $ 671,978,000    $ (42,801,000)        $ 629,177,000
                                                          =============    =============         =============
    LIABILITIES AND STOCKHOLDERS' EQUITY (DEFICIT)
    ----------------------------------------------

CURRENT LIABILITIES:

 Revolving Credit Facility ............................   $        --      $        --           $        --
 Current portion of long-term debt ....................          55,000       4,000,000 (2)          4,055,000
 Accounts payable and accrued expenses ................      68,626,000             --              68,626,000
                                                          -------------    -------------         -------------
          Total current liabilities ...................      68,681,000       4,000,000             72,681,000
LONG-TERM DEBT, NET OF CURRENT PORTION ................     327,845,000     (29,500,000)(1,2)      647,153,000
                                                                           (298,250,000)(2)
                                                                            647,058,000 (2)
DEFERRED INCOME TAXES AND OTHER LIABILITIES ...........      27,800,000                             27,800,000
STOCKHOLDERS' EQUITY (DEFICIT):
 Common stock .........................................         473,000         256,000 (2)            256,000
                                                                               (473,000)(7)
 Paid-in capital ......................................     272,420,000      23,942,000 (6)
                                                                              4,788,000 (7)
                                                                            422,776,000 (6)                --
                                                                           (723,926,000)(7)
 Treasury stock .......................................             --     (677,569,000)(3)                --
                                                                           (106,148,000)(8)
                                                                            783,717,000 (7)
 Unrealized gain on investments .......................           1,000             --                   1,000
 Retained deficit .....................................     (25,242,000)    (26,500,000)(4)       (118,714,000)
                                                                             (4,788,000)(5)
                                                                             (7,093,000)(2)
                                                                              4,227,000 (5)
                                                                            (59,318,000)(7)
                                                           -------------  -------------         -------------
          Total stockholders' equity (deficit) ........     247,652,000    (366,109,000)          (118,457,000)
                                                          -------------    -------------        -------------
                                                          $ 671,978,000   $ (42,801,000)         $ 629,177,000
                                                          =============   =============          =============
</TABLE>

          See accompanying Notes to Consolidated Pro Forma Financial Statements.


                                       13
<PAGE>

                          CONCENTRA MANAGED CARE, INC.

                 Consolidated Pro Forma Statements of Operations
              For the Three Months Ended March 31, 1999 (Unaudited)



<TABLE>
<CAPTION>
                                                                     PRO FORMA
                                                CONCENTRA           ADJUSTMENTS       PRO FORMA
                                              --------------        -----------      -----------
<S>                                            <C>              <C>                 <C>
Revenues:
  Health services ..........................   $  70,622,000    $          --       $  70,622,000
  Managed care services:
    Specialized cost containment ...........      46,712,000               --          46,712,000
    Field case management ..................      38,077,000               --          38,077,000
                                               -------------    -------------       -------------
        Total managed care services ........      84,789,000               --          84,789,000
                                               -------------    -------------       -------------
              Total revenues ...............     155,411,000               --         155,411,000
Cost of Services:
  Health Services ..........................      57,800,000               --          57,800,000
  Managed care services ....................      65,937,000               --          65,937,000
                                               -------------    -------------       -------------
        Total cost of services .............     123,737,000               --         123,737,000
                                               -------------    -------------       -------------
              Total gross profit ...........      31,674,000               --          31,674,000
General and administrative expenses ........      14,420,000               --          14,420,000
Amortization of intangibles ................       3,038,000               --           3,038,000
                                               -------------    -------------       -------------
        Operating income ...................      14,216,000               --          14,216,000
Interest expense ...........................       4,677,000       12,744,000 (2)      17,421,000
Interest income ............................      (1,112,000)       1,112,000 (9)              --
Other, net .................................          98,000               --              98,000
                                               -------------    -------------       -------------
    Income (loss) before income taxes ......      10,553,000      (13,856,000)         (3,303,000)
Provision (benefit) for income taxes .......       4,485,000       (5,392,000)(10)       (907,000)
                                               -------------    -------------       -------------

Net income (loss) from continuing operations   $   6,068,000    $  (8,464,000)      $  (2,396,000)
                                               =============    =============       =============

Basic earnings (loss) per share ............           $0.13                               $(0.09)
                                               =============                        =============
  Weighted average common shares outstanding      47,251,000      (21,613,000)(11)     25,638,000

Diluted earnings (loss) per share ..........           $0.13                               $(0.09)
                                               =============                        =============
  Weighted average common shares and
    equivalents outstanding ................      47,882,000      (22,244,000)(11)     25,638,000
</TABLE>





         See accompanying Notes to Consolidated Pro Forma Financial Statements.



                                       14
<PAGE>


                          CONCENTRA MANAGED CARE, INC.

                 Consolidated Pro Forma Statements of Operations
                For the Year Ended December 31, 1998 (Unaudited)
<TABLE>
<CAPTION>

                                                                                 PRO FORMA
                                                            CONCENTRA           ADJUSTMENTS          PRO FORMA
                                                        ----------------        -----------         -----------
<S>                                                       <C>                <C>                    <C>
Revenues:

  Health services                                         $259,481,000       $         --           $259,481,000
  Managed care services:
    Specialized cost containment                           183,734,000                 --            183,734,000
    Field case management                                  167,841,000                 --            167,841,000
                                                           -----------       ------------           ------------
        Total managed care services                        351,575,000                 --            351,575,000
                                                           -----------       ------------           ------------
            Total revenues                                 611,056,000                 --            611,056,000
Cost of Services:
  Health services                                          201,181,000                 --            201,181,000
  Managed care services                                    268,116,000                 --            268,116,000
                                                           -----------       ------------           ------------
        Total cost of services                             469,297,000                 --            469,297,000
                                                           -----------       ------------           ------------
            Total gross profit                             141,759,000                 --            141,759,000
General and administrative expenses                         45,326,000                 --             45,326,000
Amortization of intangibles                                  8,119,000                 --              8,119,000
Non-recurring charge                                        33,114,000                 --             33,114,000
                                                           -----------       ------------           ------------
            Operating income                                55,200,000                 --             55,200,000
Interest expense                                            18,021,000         51,188,000 (2)         69,209,000
Interest income                                             (4,659,000)         4,659,000 (9)                 --
Other, net                                                      44,000                 --                 44,000
                                                           -----------       ------------           ------------
  Income (loss) before income taxes                         41,794,000        (55,847,000)           (14,053,000)
Provision (benefit) for income taxes                        19,308,000        (21,181,000)(10)        (1,873,000)
                                                           -----------       ------------           ------------
  Net income (loss) from continuing operations             $22,486,000       $(34,666,000)          $(12,180,000)
                                                           ===========       ============           ============

  Basic earnings (loss) per share                                $0.48                                    $(0.48)
                                                           ===========                              ============
  Weighted Average Common Shares Outstanding                46,451,000        (20,813,000)(11)        25,638,000

Diluted earnings (loss) per share                                $0.47                                    $(0.48)
                                                           ===========                               ===========
  Weighted average common shares and
    equivalents outstanding                                 47,827,000        (22,189,000)(11)        25,638,000
</TABLE>

 See accompanying Notes to Consolidated Pro Forma Financial Statements.



                                       15
<PAGE>

                          CONCENTRA MANAGED CARE, INC.


       Notes To Consolidated Pro Forma Financial Statements (Unaudited)

(1)   To record the equity contributions and the receipt of $233,784,000 of cash
      and $29,500,000 of convertible subordinated notes by WCAS,  $30,600,000 of
      cash by Ferrer Freeman and $23,000,000 of cash by other investors.


(2)   The table below  reflects  the pro  forma  adjustments  to record  (i) the
      repayment or equity contribution of certain existing debt and the issuance
      of new debt associated with the merger,  (ii) the write-off of Concentra's
      existing deferred  finance  costs on debt to be repaid  and to record  new
      deferred finance costs associated with the issuance of new debt, and (iii)
      the related interest expense adjustment to reflect the pro forma effect of
      (i) and (ii) above.


<TABLE>
<CAPTION>
                                                                                               INTEREST
                                                                         INTEREST               EXPENSE
                                                            AMOUNT         RATE               ADJUSTMENT
                                                            -------       -------             -----------
                                                                                    YEAR            THREE MONTHS
                                                                                   ENDED               ENDED
                                                                              DECEMBER 31, 1998    MARCH 31, 1999
                                                                              -----------------    --------------
(DOLLARS IN THOUSANDS)
<S>                                                       <C>              <C>        <C>               <C>
Repayment or equity contribution of existing debt:
Commitment fees on existing Revolving
  Credit Facility .....................................    $      --                  $   (250)         $    (63)
4.5% Convertible Subordinated Notes due March  2003 ...     (230,000)      4.50%(a)     (8,165)           (2,587)
6.0% Convertible  Subordinated Notes due December  2001      (97,750)      6.00%        (5,865)           (1,466)
Interest on other indebtedness paid off during the year           --                    (2,042)              (62)
                                                            --------                  --------          --------
        Total existing debt ...........................     (327,750)                  (16,322)           (4,178)
Equity contributions of convertible notes by WCAS .....      (29,500)
                                                            --------
        Total repayment of existing debt ..............    $(298,250)
                                                           =========
Issuance of new debt:
Term Facilities:
  Commitment fee on new $100,000,000 Credit Facility ..    $    --                         500               125
  Tranche B at ABR plus applicable margin due 2006 ....      250,000       8.25%(b)     20,625             5,157
  Tranche C at ABR plus applicable margin due 2007 ....      125,000       8.50%(b)     10,625             2,656
Senior Subordinated Notes at 10.75% due 2009 ..........      190,000      10.75%        20,425             5,106
Senior Discount Debentures with warrants at 13.75%
 due 2010(c) ..........................................       86,058      16.63%(c)     14,908             3,846
                                                           ---------                   -------          --------
                                                             651,058                    67,083            16,890
Warrants to purchase Concentra stock(c) ...............       23,942
                                                           ---------
                                                           $ 675,000
                                                           =========
Amortization of existing deferred finance costs
 on debt being repaid: ...............................
        December 31, 1998 ............................     $  (7,592)                   (1,699)
        March 31, 1999 ...............................        (7,093)                                       (499)
Amortization of deferred finance costs on new debt ...        17,500(d)                  2,126               531
                                                                                      --------          --------
        Total interest expense adjustment ............                              $   51,188        $   12,744
                                                                                      ========          ========
</TABLE>

(a)   The 4.5% convertible  subordinated notes were issued in March
      ($200,000,000)  and April  ($30,000,000)  of 1998.  As such,  the interest
      expense does not reflect a full year of interest expense.



(b)   The  Adjusted  Borrowing  Rate  ("ABR")  is assumed to be 5% for the
      purposes of  calculating  interest  expense.  The annual  effect of a 1/8%
      change in the  interest  rate on the  $375,000,000  variable  rate debt is
      $469,000  for the year ended  December 31, 1998 and $117,000 for the three
      months ended March 31, 1999.

(c)   Reflects  $110,000,000 Senior Discount Debentures less debt discount
      of $23,942,000 which is the value assigned to the detachable warrants
      for the purchase of 1,451,000 shares of Concentra stock at an exercise
      price of $0.01 per share. The effective interest rate is 16.63%.

(d)   The  estimated  deferred  finance  fees  of  $17,500,000  are  being
      amortized over the weighted average life of the new debt of 8.7 years.



                                       16
<PAGE>

(3)   To  reflect  the  repurchase  of  41,064,817  shares  of  common  stock by
      Concentra at $16.50 per share.  These shares are  comprised of  47,303,020
      shares  outstanding  at March 31, 1999 plus 195,000  shares of  restricted
      stock vested and issued at the time of merger,  less the 6,433,203  shares
      owned by WCAS prior to the merger (see note 6).
(4)   To record the use of cash to fund approximately $44,000,000 of transaction
      fees  consisting of deferred  finance costs of  approximately  $17,500,000
      (see  note  2(d))  and  banking,  professional  fees  and  other  fees  of
      $26,500,000  associated  with the  merger,  which  will be  expensed.  The
      expensed  portion of the fees of $26,500,000 has not been reflected on the
      Consolidated  Pro Forma Statement of Operations,  as they are one-time and
      unusual in nature.
(5)   To  record  the tax  benefit  ($4,227,000)  on the pro  forma  adjustments
      associated with the write-off of the existing  deferred finance costs (see
      note 2) and the vesting and  issuance of  restricted  stock as a result of
      the merger.  For the purposes of these  consolidated  pro forma  financial
      statements, Concentra has assumed that none of the expensed portion of the
      transaction fees of $26,500,000 will be deductible for tax purposes.
(6)   To  record  the  capital  contribution  of cash and  convertible  notes of
      $316,884,000  (see note 1) and 6,433,203  shares of Concentra common stock
      owned  by  WCAS.  WCAS,  Ferrer  Freeman  and  other  investors  will  own
      22,389,824,  (87.3%),  1,854,545  (7.2%) and  1,393,939  (5.5%)  shares of
      Concentra common stock post-merger, respectively.

(7)   To retire Concentra's  outstanding common stock at the time of the merger.
      The  value of the  treasury  stock  of  $783,717,000  exceeds  Concentra's
      required stated capital and paid-in capital by $59,318,000  which has been
      reflected as an increase to Concentra's retained deficit.

(8)   To reflect 6,433,203 shares of Concentra common stock owned by WCAS, which
      were  contributed to capital and will be subsequently  retired at the time
      of the merger.
(9)   To  record  the  decrease  in  interest income due to the use of available
      cash.
(10)  To  record the tax benefit on the pro forma interest  adjustments  at7.9%,
      for the year ended December 31, 1998 and 38.9% for the three months ended
      March 31, 1999.
(11)  To retire Concentra's  outstanding common stock and reflect the subsequent
      re-issuance  of new  common  stock  to  WCAS,  Ferrer  Freeman  and  other
      investors in connection  with the merger.  The merger  agreement  provides
      that  Concentra  will use its best efforts to effect the  cancellation  or
      amendment at the effective time of the merger of all  outstanding  options
      to acquire  Concentra common stock in exchange for a cash payment equal to
      $16.50 per share to such holder less the exercise  price per share of such
      option.  Concentra  has not yet  developed  a plan with regard to unvested
      options. If all vested  in-the-money  (exercise price less than $16.50 per
      share)  options and warrants are exercised at the time of the merger,  the
      cash  proceeds  from the  exercise  would be  $9,649,000,  the related tax
      benefit would be $5,078,000,  cash required to repurchase the  outstanding
      shares would be $23,934,000  and  stockholders'  deficit would increase to
      ($127,020,000).  The  settlement of the vested  in-the-money  options will
      result in a non-cash compensation charge of approximately $12,400,000.  As
      the exercise of these  options and warrants are not directly  attributable
      to the  merger,  their  exercise  and  resulting  repurchase  has not been
      reflected  as a  pro  forma  adjustment  in  the  consolidated  pro  forma
      financial statements.


                                       17
<PAGE>

                              CERTAIN PROJECTIONS

         In  connection  with WCAS's and Ferrer  Freeman  Thompson & Co.,  LLC's
review of Concentra  and in the course of the  negotiations  between  Concentra,
WCAS and  Ferrer  Freeman  Thompson  & Co.,  LLC  described  in "The  Merger  --
Background," Concentra provided WCAS and Ferrer Freeman Thompson & Co., LLC with
non-public  business  and  financial  information.  The  non-public  information
Concentra   provided  included   projections  of  Concentra's  future  operating
performance. These projections do not give effect to the merger or the financing
of the merger.

         Concentra  does  not,  as  a  matter  of  course,   publicly   disclose
projections of future revenues or earnings.  The  projections  were not prepared
with a view to public  disclosure and are included in this proxy  statement only
because such  information was made available to WCAS and Ferrer Freeman Thompson
& Co., LLC in connection  with their due diligence  investigation  of Concentra.
The  projections  were not prepared with a view to compliance with the published
guidelines of the Securities and Exchange Commission regarding projections,  nor
were they prepared in accordance with the guidelines established by the American
Institute of Certified  Public  Accountants for preparation and  presentation of
financial  projections.   While  presented  with  numerical  specificity,  these
projections  reflect  numerous  assumptions made by Concentra's  management.  In
addition,  factors such as industry performance and general business,  economic,
regulatory,  market and  financial  conditions,  all of which are  difficult  to
predict  and  beyond  the  control  of  Concentra's  management,  may  cause the
projections or the underlying assumptions to be inaccurate.  Accordingly,  there
can be no assurance that the  projections  will be realized,  and actual results
may be materially greater or less than those contained in the projections.


         Concentra does not intend to update or otherwise revise the projections
to reflect  circumstances  existing  after the date when made or to reflect  the
occurrence of future events even in the event that any or all of the assumptions
underlying the projections are shown to be in error.


         The projections  Concentra provided to WCAS and Ferrer Freeman Thompson
& Co., LLC included  estimates of calendar year 1999 revenues,  earnings  before
interest,  taxes, depreciation and amortization and earnings per share of $722.0
million, $126.4 million and $0.95, respectively,  and estimates of calendar year
2000 revenues,  earnings before interest,  taxes,  depreciation and amortization
and  earnings  per  share  of  $831.5   million,   $150.0   million  and  $1.10,
respectively. WCAS and Ferrer Freeman Thompson & Co., LLC took this information,
together with their own analyses,  into account in determining whether to invest
in Concentra.

                                       18
<PAGE>


                        CAUTIONARY STATEMENT CONCERNING
                          FORWARD-LOOKING INFORMATION

     Concentra   cautions  you  that  this  proxy  statement,   the  information
incorporated in this proxy statement by reference and other statements Concentra
makes from time to time contain statements that may constitute  "forward-looking
statements." Those statements include statements  regarding  Concentra's intent,
belief  or  current  expectations,  as well as the  assumptions  on which  those
statements  are based.  In  preparing  these  projections,  Concentra  assumed a
compounded  annual growth rate in revenues,  operating margins and net income of
12.6%, 15.7% and 17.6%,  respectively,  and an effective annual tax rate of 41%.
Forward-looking  statements are not guarantees of future performance and involve
risks and  uncertainties,  and actual results may differ  materially  from those
contemplated by forward-looking statements. Important factors currently known to
Concentra's  management  and Yankee  that could cause  actual  results to differ
materially from those in forward-looking statements include, but are not limited
to, those  factors set forth from time to time in reports  Concentra  filed with
the Securities  and Exchange  Commission.  Except as required by law,  Concentra
undertakes  no  obligation  to update or revise  forward-looking  statements  to
reflect  changes in  assumptions,  the  occurrence  of  unanticipated  events or
changes to future  operating  results over time.  You are cautioned not to place
too much reliance on such statements.

                                SPECIAL FACTORS

BACKGROUND OF THE MERGER

     In early August 1998,  representatives of WCAS telephoned Donald J. Larson,
who was then Chief  Executive  Officer  of  Concentra,  in order to discuss  the
possibility of WCAS acquiring Concentra.  On August 25, 1998, WCAS sent a letter
to Mr. Larson  confirming its interest in pursuing a potential  transaction with
Concentra.  Concentra  believes that Mr. Larson  intended to defer a response to
WCAS until he had an  opportunity  to  consult  with the Board of  Directors  of
Concentra (the "Board") at its next regularly scheduled meeting on September 15,
1999.  Prior to September 15, 1998, WCAS also attempted to initiate  preliminary
conversations with two other officers of Concentra, David J. Thomas and James M.
Greenwood.   Mr.  Thomas  and  Mr.  Greenwood  informed  WCAS  that  they  would
communicate WCAS expression of interest to the Board.

     On September 8, 1998,  Concentra  issued a press  release  announcing  that
Concentra's  revenues  and net income  for the first two  months of the  quarter
ending  September  30, 1998,  were below  expectations  and that,  consequently,
results for the third quarter were likely to be lower than analysts'  estimates.
Further,   Concentra   revised  its  projected   rate  of  revenue  growth  from
approximately  30%  to  approximately   20%,  which  would  have  an  effect  on
Concentra's earnings outlook. As a result, Concentra revised its forward-looking
earnings per share estimates to $0.29 and $0.21 for the third quarter and fourth
quarter of 1998, respectively. On the day of this announcement, the market price
of Concentra's  common stock on the NASDAQ National Market dropped from $12 3/16
to $6 3/32.

                                       19
<PAGE>

     On  September  15, 1998, a  representative  of Donaldson  Lufkin & Jenrette
Securities  Corporation ("DLJ"),  acting on behalf of WCAS, delivered to each of
Concentra's   directors  an  unsolicited   letter  in  which  WCAS  expressed  a
non-binding  interest in  acquiring  Concentra's  outstanding  common stock at a
price of $16 per share.  WCAS stated its  willingness to commence  immediately a
due diligence  investigation and to make and complete an acquisition proposal on
an expedited basis.

     Also on September 15, 1998, at a regularly  scheduled meeting of the Board,
Donald J. Larson resigned as Concentra's  Chairman and Chief Executive  Officer.
The Board  elected  Daniel J. Thomas,  formerly  President  and Chief  Operating
Officer,  to be Interim Chief Executive Officer,  and elected John K. Carlyle, a
director and formerly Chairman of Concentra, to be Concentra's Chairman.

     At the September 15 Board meeting,  the members of the Board also discussed
the WCAS  indication  of interest,  potential  alternatives  to the  transaction
proposed by WCAS,  and several Board  members'  potential  conflicts of interest
with respect to any transaction with WCAS as a result of previous  relationships
with WCAS. At this meeting, Richard A. Parr II, Concentra's General Counsel, and
a representative of Concentra's legal counsel,  Vinson & Elkins L.L.P., apprised
the Board of the  appropriate  process for  evaluating  the WCAS  indication  of
interest,  for  addressing  directors'  potential  conflicts of interest and for
addressing potential competing offers, and discussed the possible formation of a
special  committee  of  independent  directors  for the  purpose of  considering
strategic alternatives  available to Concentra,  including remaining independent
and evaluating the WCAS indication of interest.  Thereafter,  the Board directed
Concentra's  senior  management  to  assess  immediately  Concentra's  financial
condition  and  strategy  in light  of the WCAS  proposal  and to  report  their
findings as soon as possible to the Board.  The Board was deferred a substantive
response  to WCAS and any  action  with  respect to the  formation  of a special
committee  until the  Board's  receipt  and  evaluation  of senior  management's
findings.  The Board  instructed Mr. Carlyle to contact WCAS to inform WCAS that
it was deferring a response, Mr. Carlyle so informed WCAS.

     On  September  22,  1998,  WCAS made a filing  under the  Hart-Scott-Rodino
Antitrust  Improvements Act of 1976, as amended (the "HSR Act"),  disclosing its
intention to acquire in excess of $15 million of Concentra's common stock.

Between September 11, 1998 and October 1, 1998,  Concentra received four letters
containing additional unsolicited  expressions of interest from third parties to
acquire  Concentra.  Bidders 1, 2 and 3 were national leveraged buyout firms and
Bidder 4 was a  regional  leveraged  buyout  firm.  Bidder 1, in a letter  dated
September 28, 1998,  expressed an interest in purchasing Concentra for $13.00 to
$15.00  per  share in cash.  Bidder 2, in a letter  dated  September  25,  1998,
offered to provide or arrange equity capital as well as senior mezzanine debt to
enable Concentra to finance a recapitalization to provide stockholders with cash
at a premium to the market price in respect of approximately  80% of Concentra's
shares. The letter elaborated that the contemplated  transaction would result in
Concentra's  public  stockholders  maintaining  ownership  of more  than  50% of
Concentra's common stock. Bidder 2's letter did not specify a purchase price for
the  acquisition.  Bidder  3, in a  letter  dated  September  30,  1998,  merely
expressed an interest in engaging in a cash  acquisition  of  Concentra  without
providing  any details.  Similarly,  Bidder 4, in a letter dated  September  11,
1998,  expressed  an interest  in entering  into a  transaction  with  Concentra
without describing the details of the transaction.


                                       20
<PAGE>

     Between  September  11,  1998 and  October  1, 1998,  Concentra  sought the
informal  assistance of BT Alex.  Brown in evaluating  Concentra's  business and
financial condition.

     On October 1, 1998,  at a special  meeting of the Board  convened to update
the Board on the results of senior  management's  assessment  in response to the
Board's September meeting, Mr. Carlyle informed the Board of Concentra's receipt
of the  additional  expressions  of interest  and of WCAS's HSR Act filing.  Mr.
Thomas and Mr.  Carlyle  reported  to the Board  regarding  senior  management's
efforts to assess the financial condition and strategy of Concentra,  and stated
that, based on the initial results of such assessment,  Concentra should further
consider the expressions of interest.  Specifically,  Mr. Thomas and Mr. Carlyle
reported that, after examining  Concentra's projected cash flows and net income,
and in light of the significant capital  expenditures  necessary or desirable in
the areas of technology,  information systems and facilities, it was likely that
the highest cash prices  offered by the bidders in their offer letters  exceeded
the anticipated  trading price of Concentra's common stock the for the remainder
of 1998 and for the years 1999 and 2000. They reported that it was expected that
Concentra would be unable to meet consensus  analysts' earning  expectations for
the remainder of 1998,  $1.04, and for 1999,  $1.30, and that Concentra would be
unable to grow its earnings at the analysts' expectation of its long term growth
rate through the year 2000 as a result of the underperformance and slower growth
of the majority of its business lines,  especially the field case management and
bill review  businesses,  due to investments in technology,  infrastructure  and
management.   The  necessary   capital   expenditures   were  expected  to  cost
approximately $40 million for 1999,  including nearly $25 million on information
technology  hardware and software for all its business lines, most notably First
Notice  and Case  Management  (which  were  undergoing  significant  development
projects),  Messrs.  Thomas and Carlyle did not make any recommendations to sell
Concentra, but rather were reporting preliminary assessments designed to aid the
Board in assessing whether to examine the matter more thoroughly through the use
of a special  committee  that would be advised by legal and  financial  advisors
selected by the committee.

     At this meeting,  Concentra's legal counsel described the fiduciary duties,
including  their  duties  of  loyalty  and  care,  owed  to  Concentra  and  its
stockholders by Concentra's directors and officers,  particularly in the context
of evaluating  Concentra's  strategic  alternatives.  Concentra's  legal counsel
further discussed the process for evaluating and addressing directors' conflicts
of  interest  and  the  structure,   functions,   responsibilities   and  likely
composition  of a possible  special  committee  to be formed for the  purpose of
addressing the expressions of interest.  The Board then determined that seven of
nine  directors  had potential  conflicts of interest  that might  preclude them
from,  or limit them in,  participating  in the  deliberations  to evaluate  the
expressions of interest.  Messrs. Carlyle,  Ortenzio, Rehm, Silverman and Thomas
each had relationships  with one or more of the bidders in which the bidders had
invested in or were  proposing to invest in ventures  with such  directors.  Mr.
Rabkin  was  engaged in  soliciting  Bidder 1 to make a  significant  charitable
contribution to a not-for-profit entity.  Messrs.  Carlyle,  Ortenzio,  Rehm and
Thomas had  pre-existing  business  relationships  with WCAS.  In  addition,  an
investment  partnership affiliated with WCAS is currently an investor in MAGELLA
Healthcare  Corporation,  a company of which Mr.  Carlyle is the  President  and
Chief Executive Officer. Mr. Silverman had a pre-existing  business relationship
with   Bidder  2.   Please   see   "Interests   of   Certain   Persons   in  the
Merger--Relationships with WCAS."

                                       21
<PAGE>

     Thereafter,  the  Board  determined  that it was in the best  interests  of
Concentra and its stockholders to form a special  committee,  consisting of Hon.
Willis D. Gradison, Jr., and George H. Conrades.  These two members of the Board
were not employed by  Concentra,  would not be involved as  participants  in any
potential transaction, and had no past or present relationship with WCAS or with
any of the  other  parties  who had  delivered  an  expression  of  interest  in
acquiring  Concentra.  The  special  committee  was  charged  by the Board  with
considering the various strategic alternatives available to Concentra, including
considering  (1) whether  Concentra  should remain  independent  and continue to
pursue its current strategy or a modified strategy, (2) any proposals to acquire
Concentra  and (3) any  proposals  to engage in a strategic  merger of Concentra
with  another  company.  The  special  committee  was  authorized  to conduct or
supervise the conduct of any negotiations with respect to such an acquisition or
merger, and to review, evaluate and make a determination with respect to such an
acquisition or merger  (including  conducting or supervising  the conduct of any
auction or related activities that the special committee might deem necessary or
appropriate to protect the interests of Concentra's  stockholders).  The special
committee  was  also  authorized  to  establish  such  procedures,  review  such
information  and engage such legal counsel and  financial  advisors as it deemed
reasonable and necessary.

     The  special  committee  retained  Ropes & Gray as its  legal  counsel  and
discussed  with them the  procedures  to be followed in  evaluating  the various
strategic  alternatives available to Concentra and responding to the expressions
of interest received by Concentra. Ropes & Gray advised the special committee of
the special committee's legal  responsibilities,  principles  applicable to, and
consequences  of,  actions  taken by the special  committee  with respect to its
evaluation of Concentra's strategic alternatives and its ultimate recommendation
to the Board.  The  procedures  outlined by Ropes & Gray  included  the need for
separate  meetings of the special  committee,  the  desirability  of controlling
communications  with Concentra's  Board and management in light of the potential
conflicts  of  interest,   and  the   anticipated   course  of  discussions  and
negotiations  with  potential  acquirors  or  merger  partners.  Following  this
discussion,  the special committee determined to meet as frequently as necessary
to remain  informed  about the status of discussions  or  negotiations  and make
decisions  regarding the  alternatives  presented.  The special  committee  also
determined  to  limit   communication  with  Concentra's  Board  and  management
regarding  potential  alternatives  being  reviewed by the special  committee to
avoid disclosure of the terms of any proposals being considered and the identity
of the parties submitting the proposals.

     The  special  committee  also  selected  BT Alex.  Brown  as its  financial
advisor. The special committee  instructed  representatives of BT Alex. Brown to
meet with members of Concentra's senior management to participate in Concentra's
detailed  evaluation of its business and financial  prospects and preparation of
an updated  five year plan.  From  October  15, 1998  through  December 2, 1998,
representatives  of BT Alex. Brown met periodically  with Mr. Thomas,  Joseph F.
Pesce,  Concentra's  Chief Financial  Officer,  and other members of Concentra's
senior management for this purpose.

     On October  10,  1998,  the Federal  Trade  Commission  granted  WCAS early
termination  of its HSR Act filing.  Concentra  did not join WCAS's  request for
early termination of its HSR Act waiting period.

                                       22
<PAGE>

     On  October  28,  1998,  at a special  meeting of the  Board,  the  special
committee  reported that it had held several  meetings with  representatives  of
Ropes & Gray and BT Alex. Brown, had scheduled additional meetings with them and
with members of Concentra's senior  management,  and would report further to the
Board  following  the special  committee's  completion  of a more  comprehensive
review of  Concentra's  business and  financial  prospects and updated five year
plan.

     On October 29, 1998,  Concentra issued its third quarter earnings  release,
announcing  results  which fell short of  previously  revised  expectations  for
revenues and profitability,  and disclosed a non-recurring charge of $15 million
to $25  million,  which  was to be  taken in the  fourth  quarter  of  1998.  In
addition,   Concentra   announced  that  it  had  received  several  unsolicited
expressions  of  interest to acquire  Concentra,  that it had formed the special
committee for the purpose of evaluating various strategic alternatives available
to Concentra,  including  remaining  independent  and pursuing its existing or a
modified strategy,  and that the special committee had engaged BT Alex. Brown as
its financial advisor.

     On November 2, 1998,  WCAS made a Schedule  13D filing with the  Securities
and Exchange  Commission  disclosing that WCAS had purchased 1,725,000 shares of
Concentra's  common stock  between  October 20, 1998 and October 30, 1998.  WCAS
also  reported  that it had  during the same  period  purchased  $20,500,000  in
principal  amount of Concentra's 4.5%  Convertible  Subordinated  Notes due 2003
(convertible into 496,969 shares of Concentra common stock) which, together with
the shares of Concentra  common stock purchased by WCAS,  would have represented
4,346,732 shares or approximately  9.1% of Concentra's  outstanding common stock
if the notes were converted.

     On  November  17,  1998,  the Board  elected  Mr.  Thomas to the  permanent
position  of  President  and  Chief  Executive  Officer,  removing  the  interim
designation  he had held  since  September  15.

     Between  October 28, 1998 and December 2, 1998, the special  committee held
additional  meetings with Ropes & Gray, BT Alex.  Brown and  Concentra's  senior
management.  The special  committee  reported to the Board at a special  meeting
held on November 17 that the special  committee  would be prepared to present an
initial  report and  preliminary  recommendations  to the Board during the first
week of December.

     On December 2, 1998,  at a special  meeting  called for that  purpose,  the
special  committee  reported  to the Board  regarding  the  special  committee's
consideration of strategic  alternatives  available to Concentra,  including the
advantages and disadvantages of each, the rationale for the special  committee's
recommendations and the special committee's analysis of Concentra's business and
financial prospects.  The special committee  recommended that Concentra pursue a
controlled  process to evaluate  and  consider  whether to preserve  Concentra's
independence  or  complete  a sale of  Concentra  and/or a  recapitalization  of
Concentra.  The process would involve contacting  selected  potential  financial
buyers and  strategic  merger  partners to gauge their  interest in acquiring or
merging with Concentra. The special committee proposed a tentative timetable for
undertaking  and  completing  the  process and  recommended  that the process be
directed  and  con-


                                       23
<PAGE>

trolled by the special  committee.  The members of the Board discussed in detail
the special committee's  recommendations and thereafter approved and adopted the
special committee's recommendations in full.

     Between  December 7 and December 14, 1998,  at the direction of the special
committee, eleven potential financial buyers and nine potential strategic merger
partners were  contacted  regarding  their interest in acquiring or merging with
Concentra.  WCAS and other parties who had delivered  expressions of interest to
the Board were among those parties  contacted.  Subsequently,  Concentra entered
into  confidentiality  and standstill  agreements  with nine financial  parties,
including WCAS, and two strategic parties, and sent each of these parties a copy
of a  confidential  memorandum  describing  Concentra.  In  selecting  potential
acquirors  and  strategic  partners to be contacted in the process,  the special
committee considered those entities which had expressed an interest in acquiring
Concentra (or a substantial  portion thereof) either before the formation of the
special  committee  or after its  inception  and  disclosure  to the public.  In
expanding the field beyond those which  independently  expressed  interest,  the
special  committee  focused  specifically  on financial  sponsors with portfolio
companies in the specialty  managed care and workers  compensation  fields which
had  completed   transactions  similar  in  size  and  scope  to  the  potential
acquisition  of Concentra  and  potential  strategic  partners in the  specialty
managed care or workers  compensation  fields with the  financial  capability to
complete a  transaction  of this size.  The  parties  ultimately  selected to be
contacted included insurance  companies,  health service providers,  information
services companies and financial sponsors.

     The special committee followed  customary  practices for sharing non-public
information  with  potential  investors  by pursuing  standstill/confidentiality
agreements.  Recognizing that material non-public  information would be included
in both management  presentations to potential  acquirors and strategic partners
as well as any  additional  due  diligence  pursued by the parties,  the special
committee  required all  interested  parties to sign  standstill/confidentiality
agreements.  Such  agreements  were  designed,  in  part,  to  protect  existing
stockholders from the harm that might result from access to material  non-public
information by potential acquirors.

     On January 12,  1999,  WCAS filed an amendment to its Schedule 13D with the
Securities  and  Exchange  Commission  indicating  that  WCAS had  purchased  an
additional 2,450,000 shares of Concentra's common stock between November 2, 1998
and  January  6,  1999  and  prior to its  execution  of a  confidentiality  and
standstill agreement with Concentra on January 12, 1999. WCAS also reported that
it had during the same period  purchased an additional  $14,000,000 in principal
amount of Concentra's 4.5% Convertible  Subordinated Notes due 2003 (convertible
into 339,395 shares of Concentra  common stock) which,  together with the shares
of Concentra common stock owned by WCAS, would have represented 7,136,127 shares
or approximately 14.9% of Concentra's outstanding common stock if the notes were
converted.

     On January 28, 1999, five financial parties,  including WCAS,  indicated in
writing their interest in acquiring  Concentra.  One strategic  party  indicated
orally an interest in a transaction with Concentra. The preliminary indications,
which were developed before  management  meetings or commencement of business or
legal due diligence, ranged from $13.50 to $20.00 per share. Each of the written
offers  presented to the special  committee on January 28, 1999  contemplated  a
struc-


                                       24
<PAGE>

ture that would be  characterized as a leveraged  recapitalization.  The written
offers  provided  for the  purchase  of  between  90% and 100% of the  currently
outstanding  shares of Concentra.  All written offers received were  conditioned
upon completing the  aforementioned  due diligence which also included,  but was
not limited to, specific financial, accounting, tax and environmental issues.

     On February 4, 1999,  Concentra  announced  revenues  and  earnings for the
fourth  quarter and year ended  December  31, 1998,  as well as a  non-recurring
charge of $20,514,000.  Concentra also announced that overall revenue growth was
expected to slow to approximately 15% for 1999, and Concentra projected earnings
of  approximately  $0.90 to $0.95  for  1999,  versus  $0.93 per share for 1998.
Concentra stated that, in the future, total revenues were anticipated to grow in
the 12% to 15% range,  and annual earnings growth was expected to  re-accelerate
to a range of approximately  15% to 18%. Finally,  Concentra  announced that the
special committee  continued to work with BT Alex. Brown to evaluate the various
strategic  alternatives  available to Concentra  and that the special  committee
planned to complete its evaluation and make a  recommendation  to the full Board
by the end of the first quarter of 1999.

     Between  February 9, 1999 and  February  23,  1999,  each of the  potential
financial  parties and the strategic party attended  presentations by members of
Concentra's senior management and was given access to extensive  documentary due
diligence information prepared by Concentra.  Five parties conducted documentary
due  diligence  to  varying  degrees.  Each  party  was also  invited  to pursue
additional  business,  legal, tax, human resources,  information  technology and
accounting due diligence.  Four parties pursued  additional due diligence beyond
the management  presentations and documentary due diligence  information.  Three
parties  pursued  tax and  audit  due  diligence.  Three  parties  performed  an
information technology review. Two parties pursued legal due diligence. WCAS was
the only party to pursue due diligence in each area.

     On  February  24,  1999,  the  special  committee   received   second-round
indications  of interest  from four  financial  parties,  including  WCAS,  each
indicating an interest in purchasing  all or  substantially  all of  Concentra's
outstanding common stock, and each proposing to effect the transaction through a
leveraged  recapitalization.  Three  of the  parties'  indications  of  interest
explicitly  required  additional  accounting  and legal due  diligence.  Various
additional  diligence  requests from these parties included the tax,  financial,
regulatory,  environmental,  employment and technology areas. Requests were also
made for select  facility site visits and interviews with customers from each of
the major business  lines.  Each of these three offers stated that an additional
two to three weeks would be necessary to complete  this  incremental  diligence.
The first two offers  were for $15.00  and $16.00 per share,  respectively.  The
third  offer  included  a range of value,  between  $16.00 and  $17.00,  but was
subject to the above other conditions,  including complete  accounting,  tax and
legal  due  diligence  as well as  additional  business  due  diligence.  WCAS's
expression  of interest  stated that its offer expired on March 5, 1999 and that
only informal  confirmatory  due diligence was required.  All parties  submitted
commitment  letters from their respective  financing sources with respect to all
financing  required for completion of the  individually  proposed  transactions.
Only  WCAS's  commitment  letters  were not  subject  to  further  business  due
diligence.

     On the evening of February 25, 1999, unsolicited,  WCAS orally indicated an
ability  to  revise  its offer to  $16.50,  subject  to  Concentra  executing  a
definitive agreement prior to March 5,


                                       25
<PAGE>

1999. On February 26, 1999, the special committee met to review the second-round
indications.  Based on written confirmation of the $16.50 offer and a commitment
from WCAS to bridge finance the  subordinated  debt and mezzanine  components of
its offer, the special  committee  elected to pursue an accelerated  transaction
with WCAS on the condition  that a definitive  agreement,  subject to no further
due diligence  investigation,  be executed by March 2, 1999 at a price of $16.50
per share.  In  electing to pursue an  accelerated  transaction  with WCAS,  the
special committee considered that WCAS's expression of interest expired on March
5, 1999, that WCAS required only informal  confirmatory due diligence,  and that
WCAS's  commitment  letters were not subject to further  business due diligence.
The special committee understood, however, that by extending the bidding process
it was possible that Concentra could have received a more attractive  offer from
any or all of the other bidders,  one of whom had previously  submitted an offer
with a range of value  between  $16.00 and $17.00.  The other  bidders and their
financing sources required  significantly  greater due diligence and the special
committee  believed it to be unlikely that a more attractive  offer would result
from the additional due diligence.  Given these factors,  the special  committee
believed  that the  stockholders'  interests  would not be  served by  rebuffing
WCAS's request for acceleration  and continuing the due diligence  investigation
of the other bidders for an extended period of time.  Legal counsel to Concentra
and to the  special  committee  commenced  negotiation  of a  definitive  merger
agreement  incorporating  the  terms  and  conditions  approved  by the  special
committee.  The merger agreement provided that all but approximately 1.9 million
shares of Concentra  common stock  (approximately  seven percent of  Concentra's
post-merger  shares  outstanding)  would be converted  into the right to receive
$16.50  in  cash,  with  Concentra's   current   stockholders   retaining  those
outstanding shares. The merger agreement further provided that, if WCAS arranged
for an independent third party investor to purchase  approximately seven percent
of Concentra's post-merger common stock,  Concentra's stockholders would receive
$16.50 in cash for 100% of their shares. The merger agreement also required that
Concentra  terminate   discussions  and  negotiations  with  other  bidders.  As
discussed  in "The Special  Committee's  and the Board's  Recommendations,"  the
special  committee  recognized  that this covenant would decrease the likelihood
that a third party would offer to acquire Concentra and that this was a negative
factor in assessing the fairness of the merger agreement.

     On  February  27,  1999,  at a special  meeting of the Board,  the  special
committee updated the Board regarding its pursuit of an accelerated  transaction
with WCAS. The special committee described the WCAS proposal and the progress of
the negotiations with WCAS and preparation of the merger agreement.

     On March 2, 1999,  at a special  meeting of the Board,  the  members of the
special committee,  Concentra's  senior management,  representatives of BT Alex.
Brown and Ropes & Gray, and  Concentra's  legal counsel  reviewed with the Board
the terms of the merger agreement and the merger,  the background of the merger,
the strategic rationale for and potential benefits of the merger, and the status
of negotiations with WCAS. At this meeting, BT Alex. Brown reviewed with the


                                       26
<PAGE>

Board and special committee the financial  analyses  performed by BT Alex. Brown
in connection  with its evaluation of the merger  consideration  and rendered an
oral opinion,  subsequently  confirmed by delivery of a written opinion,  to the
effect  that,  as of the date of the  opinion  and based upon and subject to the
matters  stated in its  opinion,  the  merger  consideration  was  fair,  from a
financial  point of view, to the holders of Concentra  common stock,  other than
WCAS or its  affiliates.  See "Opinion of  Concentra's  Financial  Advisor." The
members of the special committee  unanimously  recommended to the Board that the
Board  accept the $16.50 offer by WCAS and approve the merger  agreement.  After
extensive consideration, the Board unanimously approved the merger agreement and
instructed   Concentra's  senior  management  and  legal  advisors  to  complete
negotiations  with WCAS and execute the merger agreement on behalf of Concentra.
For a more  complete  discussion  of the  analysis  of the Board and the special
committee, see "Special Committee's and Board's Recommendation."

     On the evening of March 2, 1999, Concentra and WCAS completed  negotiations
and  Concentra  and Yankee  Acquisition  Corp.  ("Yankee")  executed  the merger
agreement.

     On March 24, 1999, WCAS notified  Concentra that Ferrer Freeman  Thompson &
Co.,  LLC had agreed to  purchase  approximately  seven  percent of  Concentra's
post-merger  common stock. On March 24, 1999,  Concentra and Yankee entered into
an amended and restated merger  agreement under which  Concentra's  stockholders
are entitled to receive $16.50 in cash for 100% of their shares.

THE SPECIAL COMMITTEE'S AND THE BOARD'S RECOMMENDATION

     The full Board formed the special committee, comprised of two disinterested
directors, to review and evaluate the proposals because it appeared that certain
of the  directors  would have  actual or  potential  conflicts  of  interest  in
evaluating  third-party  proposals  to acquire  Concentra.  Neither of these two
directors were, or had ever been, employees of Concentra.  The special committee
unanimously  recommended  to the Board that the merger  agreement  be  approved.
Following  the  unanimous  recommendation  of the special  committee,  the Board
approved the merger agreement and recommended that the stockholders of Concentra
approve the merger  agreement.  In approving the merger  agreement,  the special
committee and the Board determined that the merger, the merger agreement and the
transactions contemplated thereby were advisable, fair and in the best interests
of  Concentra  and its  stockholders,  other than WCAS and its  affiliates.  The
special  committee  and the Board each  adopted the analyses and findings of the
special  committee's  financial advisor, BT Alex. Brown. See "Special Factors --
Opinion of Concentra's Financial Advisor."

     The special  committee met on six occasions between October 1, 1998 and the
date of this proxy statement,  in person or by telephone,  to select their legal
counsel  and  financial  advisor  and to  consider  developments  relating  to a
possible  sale  of  Concentra.   The  special  committee  was  assisted  in  its
deliberations by its financial  advisor,  BT Alex. Brown, and its legal counsel,
Ropes & Gray. BT Alex.  Brown acted on behalf of  Concentra.  Ropes & Gray acted
solely on the behalf of unaffiliated securityholders. At a meeting held on March
2, 1999, the special committee  determined that the merger, the merger agreement
and the transactions contemplated thereby were fair and in the best interests of
Concentra  and  its  stockholders,   other  than  WCASand  its  affiliates,  and
recommended that the full Board approve the merger agreement.


                                       27
<PAGE>

     The Special  Committee And The Board  Unanimously  Recommend That You Vote
For The Approval And Adoption Of The Merger Agreement.

     The special  committee and the Board  believes that the terms of the merger
agreement and the merger are advisable and fair to and in the best  interests of
Concentra and its  stockholders  other than WCASand its affiliates.  In reaching
its  determination  to recommend  the merger  agreement,  the special  committee
considered a number of factors, including the following:

     1. The special  committee  considered the value of the  consideration to be
received  by  Concentra's  stockholders  in the merger.  The  special  committee
considered the historical  market prices and trading  information  for Concentra
common  stock,  the price per share  offered by Yankee,  the  certainty of value
provided by the cash  consideration  and the fact that the merger  consideration
represents a  significant  premium over the market  prices at which  Concentra's
common stock had previously traded, including, but not limited to, the fact that
the $16.50 per share cash  consideration  represented  a 37.5%  premium over the
$12.00 trading price on October 28, 1998, the day before Concentra announced the
formation of the special  committee and a 161.4%  premium over the $6.31 trading
price on October 9, 1998,  the day before the Federal Trade  Commission  granted
early  termination  of  WCAS's  HSR Act  filing.

     2. As  described  above  under  "Background  of the  Merger,"  the  special
committee noted that the merger  consideration and the ultimate selection of the
Yankee  proposal  was the  result  of an  extensive  process  that  resulted  in
discussions with a substantial number of potential bidders in a process designed
to elicit third-party proposals to acquire Concentra,  and that the participants
in the process were afforded ample opportunity to submit proposals to Concentra.

     3. The special  committee  considered  information  concerning  Concentra's
financial performance,  financial condition,  business operations and prospects.
In particular,  the special  committee  considered the  projections  prepared by
Concentra's management described in "Summary--Certain  Projections." The special
committee also considered that necessary or desirable  investments in facilities
and information  systems and technology would require  substantial  expenditures
which  might  have a  short-term  negative  impact on  earnings  per share  and,
consequently,  the market price of Concentra common stock. The special committee
considered  the prospects of continuing to operate  Concentra as an  independent
public company and the possibility that Concentra's future performance might not
in the  foreseeable  future lead to a trading price for  Concentra  common stock
having a higher present value than the merger consideration.

     4. The special committee  considered a number of strategic  alternatives to
the merger agreement. At the direction of the special committee,  nine potential
strategic  merger  partners were contacted  regarding  their interest in merging
with  Concentra.  Only one  potential  strategic  merger  partner  indicated  an
interest in a transaction with Concentra,  but, after attending presentations by
Concentra's senior management, it never submitted a merger proposal. The special
committee  also  considered  redeploying  Concentra's  specialty  managed  care,
physician practice management or healthcare  information  technology  operations
through a divestiture,  subsidiary initial public offer-


                                       28
<PAGE>

ing,  spin-off or similar  transaction.  The special  committee  considered that
those  alternatives  involved numerous risks and problems,  including  valuation
issues, lost synergies, additional transaction risks, tax and accounting issues,
and management  challenges.  The special committee  concluded that none of these
strategic  alternatives were likely to enhance  stockholder value as much as the
merger  agreement.

     5. The special  committee  considered  that  Concentra  may be managed more
effectively as a private company. In particular, as a private company, Concentra
would  not  be  subject  to  pressures  from  public   stockholders  and  market
professionals  to maintain  and grow  earnings  per share and would have greater
flexibility  to  consider  business  strategies  that  have  long-term  benefits
(including investments in facilities and information systems and technology that
might be dilutive in the short term),  but that might adversely  affect earnings
per share and the market  price of  Concentra  common stock in the short term if
Concentra were a public company.  The special  committee based its assessment on
its  members'  experience  with  securities  analysts,  investment  bankers  and
investors and input from the committee's financial advisor.

     6. The special  committee  considered  the strong  financial  condition and
business  reputation of WCAS, the experience and high rate of success of WCAS in
structuring  and completing  transactions  similar to the merger,  the financing
commitments  obtained  by WCAS and WCAS's  ability to  complete  the merger in a
timely manner and without substantial additional due diligence.

     7. The special  committee  considered  the opinion of BT Alex.  Brown dated
March 2, 1999 as to the fairness,  from a financial point of view, of the merger
consideration to the holders of Concentra  common stock,  other than WCAS or its
affiliates,  and further  considered the related financial analyses performed by
BT Alex.  Brown,  as described  below under  "Opinion of  Concentra's  Financial
Advisor."

     The special  committee also considered  potential  negative  aspects of the
merger agreement, including the following:

     1. At times, the Concentra common stock has traded  substantially above the
amount of the merger consideration. See "Summary Historical Market Information."
The special committee believed, however that significant decreases in the market
prices  of  healthcare  stocks  combined  with  Concentra's  need to  invest  in
facilities,  information systems and technology, which would require substantial
expenditures that might have a short-term negative impact on earnings per share,
made it unlikely  that  Concentra  common  stock would trade above $16.50 in the
foreseeable future.

     2. The special  committee  considered that,  after the merger,  Concentra's
current public  stockholders will not participate in Concentra's future earnings
and growth.

     3. The special committee  considered certain restrictive  provisions of the
merger agreement,  including the restrictions  relating to solicitation of third
party proposals, the termination provisions and the size, nature and events that
would trigger the payment of the $25 million ter-


                                       29
<PAGE>

mination fee and related expense reimbursement obligation, capped at $4 million,
contained in the merger  agreement  (see "The Merger  Agreement - Termination of
the Merger  Agreement" and "Termination  Fees").  Although the special committee
determined that the terms of the merger  agreement were favorable to Concentra's
stockholders,  the special  committee  recognized that the provisions  requiring
Concentra to  terminate  discussions  and  negotiations  with other  bidders and
limiting Concentra from soliciting or encouraging alternative proposals, and the
termination  fee provisions  requiring  Concentra to pay WCAS $25 million in the
aggregate  and  up to  an  additional  $4,000,000  to  reimburse  WCAS  for  its
out-of-pocket  expenses,  would decrease the likelihood that a third party would
offer to acquire  Concentra.  Nonetheless,  the special committee  believed that
such provisions were in the best interests of Concentra's  stockholders  because
they  enhanced the  likelihood  that the merger would be  accomplished,  thereby
providing   Concentra's   stockholders   with  the   benefits   of  the   merger
consideration.  The special committee also noted that termination fee provisions
are  customary in documents  like the merger  agreement,  particularly  when the
target  company  has the  right,  as does  Concentra,  to  terminate  the merger
agreement if its board of directors,  in the exercise of its  fiduciary  duties,
determines  termination is required by reason of another  acquisition  proposal.
The special  committee  determined  that the amounts of the  termination fee and
reimbursement  cap,  and the  circumstances  in which they  would be paid,  were
customary in transactions of the size and nature of the merger. In addition,  in
evaluating  the  provisions,  the special  committee also took into account that
Concentra had contacted a substantial  number of potential  bidders and afforded
them a full opportunity to submit an offer to acquire Concentra.

     4. The special  committee  considered that Yankee's  stockholders may cause
Concentra,  upon completion of the merger,  to enter into employment  agreements
with Concentra's  executive officers and to grant the executive officers options
to  purchase  shares of  Concentra  common  stock.  The special  committee  also
considered that the executive officers may be given the opportunity to roll over
their current  equity  investment in Concentra into common stock of Concentra as
the surviving  corporation  in the merger.  No such  agreements or option grants
were effective when the special committee approved the merger agreement.

     5. The special  committee  considered  that it was approving an accelerated
transaction  with  Yankee  without  pursuing  further the  negotiation  of other
second-round indications of interest. The special committee also considered that
one of these indications of interest included a range of value having a high end
of $17.00 per share.  The  special  committee  realized,  however,  that  WCAS's
expression  of  interest  expired  on March 5,  1999,  that WCAS  required  only
informal confirmatory due diligence, and that WCAS's commitment letters were not
subject to further business due diligence. The other bidders and their financing
sources  required  significantly  greater  due  diligence.  Based on the special
committee's   knowledge  of  the  other  bidder's   significant   due  diligence
requirements  and the  special  committee's  assessment  of the  other  bidder's
history of completing similar  transactions,  ability to finance the acquisition
of Concentra and efforts to enter into a definitive  agreement  with  Concentra,
the  special  committee  believed it to be  unlikely  that a higher  offer would
result from the  additional  due diligence.  The special  committee  understood,
however,  that by extending the bidding  process it was possible that  Concentra
could  have  received  a more  attractive  offer  from  any or all of the  other
bidders. Additionally, the special committee


                                       30
<PAGE>

noted that  prolonging  the  process  might lead to offers  that were lower than
those contained in the second round indications of interest or the WCAS offer of
$16.50 per share and that WCAS may  significantly  lower its offer of $16.50 per
share or  withdraw  its offer  altogether.  Given  these  factors,  the  special
committee  believed  that the  stockholders'  interests  would  not be served by
rebuffing  WCAS's  request for  acceleration  and  continuing  the due diligence
investigation  of the other  bidders  for an extended  period of time.  See "The
Merger - Background of the Merger."

     6. The special  committee  considered that Concentra's debt to equity ratio
will be substantially  higher following the merger and that Concentra's existing
creditors at the time of the merger could possibly allege that the leveraging of
Concentra  to pay the  merger  consideration  involved a  fraudulent  conveyance
entitling  them to  recover a portion or all of the  merger  consideration  from
Concentra's public stockholders.  The special committee did not believe that the
merger  would  constitute  a  fraudulent  conveyance.  In  approving  the merger
agreement,  the  special  committee  concluded  that the  benefits of the merger
agreement far outweighed the risk that the merger would  constitute a fraudulent
conveyance  that  would  enable  Concentra's  creditors  to  recover  the merger
consideration from Concentra's public stockholders.

     7. The special committee considered that Concentra would be required to pay
substantial  costs  and  fees to its  financial,  legal,  accounting  and  other
advisors in  consummating  the  merger.  The special  committee  concluded  that
Concentra's  professional  advisors provided substantial benefits in negotiating
the financial and legal aspects of the merger agreement and that their fees were
reasonable.

     8. The special committee  considered the risk that the merger consideration
is fixed and will not be adjusted in the event of an increase or decrease in the
market price of Concentra common stock or the value of Concentra's business. The
special  committee  recognized that fixed merger  consideration in a transaction
such as the merger is not unusual and that the fixed merger consideration, while
creating  a risk to  Concentra's  stockholders,  could  also  operate to benefit
Concentra's   stockholders,   especially  in  light  of  the  recent  historical
performance of Concentra common stock.

     In considering  the fairness of the merger,  the special  committee and the
Board did not emphasize  Concentra's net book value or liquidation  value, which
were not  believed to be  material in  evaluating  the value of  Concentra.  The
special committee and the Board further believed that the Company's  liquidation
value would be substantially below $16.50 per share.

     The foregoing  discussion of factors considered by the special committee is
not  exhaustive,  but  Concentra  believes  it  includes  the  material  factors
considered by the special  committee.  The special committee did not quantify or
otherwise attempt to assign relative weights to the specific factors the special
committee  considered  in reaching its  determination  to recommend  the merger.
Rather,  the special  committee viewed its position and  recommendation as being
based on the  total  information  presented  to and  considered  by the  special
committee.

Opinion Of Concentra's Financial Advisor

Concentra  engaged  BT Alex.  Brown to act as  exclusive  financial  advisor  to
Concentra and the special  committee in connection with the merger.  On March 2,
1999, at a meeting of the Concentra board held to evaluate the proposed  merger,
BT  Alex.  Brown  rendered  an oral  opinion,  which  opinion  was  subsequently
confirmed by delivery of a written  opinion  dated March 2, 1999,


                                       31
<PAGE>

to the effect  that,  as of that date and based upon and  subject to the matters
stated in its opinion, the merger consideration was fair, from a financial point
of view,  to the  holders  of  Concentra  common  stock,  other than WCAS or its
affiliates.

The full text of BT Alex.  Brown's  written  opinion dated March 2, 1999,  which
describes the assumptions made, matters considered and limitations of the review
undertaken,   is  attached  as  Appendix  B  to  this  proxy  statement  and  is
incorporated  herein by reference.  BT Alex.  Brown's opinion is directed to the
Concentra Board and special committee, addresses only the fairness of the merger
consideration from a financial point of view, does not address the merits of the
underlying  decision  by  Concentra  to  engage  in the  merger,  and  does  not
constitute a recommendation to any stockholder as to how such stockholder should
vote with respect to matters relating to the proposed merger.  The summary of BT
Alex.  Brown's opinion described below is qualified in its entirety by reference
to the full text of such opinion.

     In connection with BT Alex. Brown's role as Concentra's  financial advisor,
and in arriving at its opinion, BT Alex. Brown:

     o reviewed publicly  available  financial and other information  concerning
       Concentra  and internal  analyses and other  information  furnished to or
       discussed with BT Alex. Brown by Concentra and its advisors;

     o held discussions  with members of the senior  management of Concentra and
       WCAS regarding the business and prospects of Concentra;

     o reviewed the reported  prices and trading  activity for Concentra  common
       stock;

     o compared  financial  and stock  market  information  for  Concentra  with
       similar  information for other  companies  whose  securities are publicly
       traded;

     o reviewed the financial  terms of recent  business  combinations  which BT
       Alex. Brown deemed comparable in whole or in part;

     o reviewed the terms of the merger agreement as originally  executed; o was
       authorized  to approach,  and held  discussions  with,  third  parties to
       solicit  indications  of  interest  with  respect to the  acquisition  of
       Concentra; and

     o performed  other studies and analyses and considered  other factors as BT
       Alex. Brown deemed appropriate.

BT Alex. Brown did not assume  responsibility  for independent  verification of,
and did not independently verify, any information, whether publicly available or
furnished to BT Alex. Brown, about Concentra both before and after giving effect
to  the  merger,  including,  without  limitation,  any  financial  information,
forecasts or projections considered in connection with the ren-


                                       32
<PAGE>

dering of its opinion.  For purposes of its opinion,  BT Alex. Brown assumed and
relied upon the accuracy and  completeness  of all  information  reviewed and BT
Alex.  Brown did not conduct a physical  inspection of any of the  properties or
assets, and did not prepare or obtain any independent evaluation or appraisal of
any of the assets or  liabilities,  of Concentra.  With respect to the financial
forecasts  and  projections  made  available  to BT Alex.  Brown and used in its
analyses,  BT Alex.  Brown assumed that they were prepared on a basis reflecting
reasonable  estimates and judgments.  In rendering its opinion,  BT Alex.  Brown
expressed no view as to the  reasonableness  of the forecasts and projections or
the  assumptions  on  which  they  are  based.  BT  Alex.  Brown's  opinion  was
necessarily  based upon economic,  market and other conditions  existing on, and
the information made available to BT Alex. Brown as of, the date of its opinion.

     For purposes of rendering its opinion,  BT Alex. Brown assumed that, in all
respects  material  to its  analysis,  the  representations  and  warranties  of
Concentra  and Yankee  contained in the merger  agreement  are true and correct,
Concentra and Yankee will each perform all of the covenants and agreements to be
performed by it under the merger agreement and all conditions to the obligations
of Concentra and Yankee to consummate  the merger will be satisfied  without any
waiver. BT Alex. Brown also assumed that all material  governmental,  regulatory
or other approvals and consents  required in connection with the consummation of
the merger will be obtained and that in connection  with obtaining any necessary
governmental,  regulatory or other  approvals and consents,  or any  amendments,
modifications  or  waivers  to any  agreements,  instruments  or orders to which
either  Concentra or Yankee is a party or is subject or by which it is bound, no
limitations,   restrictions   or  conditions  will  be  imposed  or  amendments,
modifications  or waivers  made that would  have a  material  adverse  effect on
Concentra  or  materially  reduce  the  contemplated  benefits  of the merger to
Concentra.  In  addition,  BT Alex.  Brown was  informed by  Concentra,  and for
purposes of rendering its opinion BT Alex.  Brown assumed,  that the merger will
be recorded as a recapitalization  for financial  reporting  purposes.  BT Alex.
Brown  expressed no opinion as to the price at which the Concentra  common stock
will trade at any time. No other instructions or limitations were imposed by the
Board  or  special   committee   upon  BT  Alex.   Brown  with  respect  to  the
investigations  made or the procedures  followed by it in rendering its opinion.

     The following is a summary of the material  analyses  performed by BT Alex.
Brown in connection  with its opinion to the Board and special  committee  dated
March 2, 1999.  Certain  of the  financial  analyses  summarized  below  include
information  presented in tabular format.  In order to fully understand BT Alex.
Brown's  financial  analyses,  the tables must be read together with the text of
each summary.  The tables alone do not constitute a complete  description of the
financial analyses. Considering the data set forth below without considering the
full   narrative   description   of  the  financial   analyses,   including  the
methodologies and assumptions underlying the analyses, could create a misleading
or incomplete view of BT Alex. Brown's financial analyses.


                                       33
<PAGE>
ANALYSIS OF SELECTED PUBLIC COMPANIES


         BT Alex.  Brown  compared  financial and stock market  information  for
Concentra and the following 11 selected publicly held companies in the specialty
managed  care  and  physician  practice  management  sectors  of the  healthcare
services industry:

         o  American Dental Partners, Inc.
         o  American Oncology Resources, Inc.
         o  CorVel Corporation
         o  First Commonwealth, Inc.
         o  First Health Group Corp.
         o  Healthcare Recoveries, Inc.
         o  Healthplan Services Corporation
         o  Orthodontic Centers of America, Inc.
         o  Pediatrix Medical Group, Inc.
         o  United Payors and United Providers, Inc.
         o  Vision Twenty-One, Inc.

         BT Alex, Brown calculated adjusted market values,  calculated as equity
market value,  plus debt, less cash, as multiples of latest 12 months  revenues,
earnings before interest,  taxes,  depreciation and  amortization,  and earnings
before interest and taxes,  and equity market values as a multiple of the latest
12 months and estimated  calendar  years 1999 and 2000  earnings per share.  All
multiples were based on closing stock prices on February 26, 1999.  Earnings per
share  estimates  for the selected  companies  were based on research  analysts'
estimates and earnings per share  estimates for Concentra were based on internal
estimates of the management of Concentra.  This analysis indicated the following
implied adjusted market value and equity market value multiples for the selected
companies,  as compared  to the implied  multiples  for  Concentra  based on the
merger consideration of $16.50 per share:

<TABLE>
<CAPTION>
                                                                                           MULTIPLES FOR
                                                        IMPLIED MULTIPLES OF            CONCENTRA IMPLIED BY
                                                         SELECTED COMPANIES             MERGER CONSIDERATION
                                                        ---------------------            -------------------
                                                      MEAN                RANGE
                                                      -----              ------
<S>                                                   <C>             <C>                        <C>
Adjusted Market Values:

Latest 12 months revenues                             1.9x            0.6x - 5.9x                1.6x
Latest 12 months earnings before
   interest, taxes, depreciation and
   amortization                                      8.0x            3.4x - 13.7x                8.9x
Latest 12 months earnings before
   interest and taxes                               10.6x            4.0x - 15.4x               11.2x



                                       34
<PAGE>

Equity Market Values:
<CAPTION>
                                                                                           MULTIPLES FOR
                                                        IMPLIED MULTIPLES OF            CONCENTRA IMPLIED BY
                                                         SELECTED COMPANIES             MERGER CONSIDERATION
                                                        ---------------------            -------------------
                                                      MEAN                RANGE
                                                      -----              ------

<S>                                                 <C>             <C>                         <C>
Latest 12 months earnings per
   share                                            16.5x           11.2x - 23.9x               17.8x
Estimated calendar year 1999
   earnings per share                               12.1x            7.5x - 19.0x               17.3x
Estimated calendar year 2000
   earnings per share                                9.9x            5.8x - 15.8x               15.0x
</TABLE>

Analysis of selected merger and acquisition transactions

     BT Alex.  Brown  reviewed  the  purchase  prices  and  implied  transaction
multiples in the  following  eight  proposed,  pending or  completed  merger and
acquisition  transactions  announced  since  January 1, 1995 having  transaction
values  greater than $150 million in the  specialty  managed care and  physician
practice management sectors of the healthcare services industry:

<TABLE>
<CAPTION>
                Acquiror                                       Target
<S>                                           <C>
o  Golder, Thoma, Cressey, Rauner Inc.,       CompDent Corporation
   TA Associates, Inc., NMS Capital Partners
o  Protective Life Corporation                United Dental Corporation
o  Magellan Health Services, Inc.             Merit Behavioral Care Corporation
o  MedPartners, Inc.                          Talbert Medical Management Holdings, Inc.
o  Magellan Health Services, Inc.             Human Affairs International, Incorporated
o  Laidlaw, Inc.                              EmCare Holdings, Inc.
o  Columbia/HCA Healthcare Corporation        Value Health, Inc.
o  Kohlberg Kravis Roberts & Co.              Merit Behavioral Care Corporation
</TABLE>


                                       35
<PAGE>

implied adjusted market value and equity market
value  multiples  for the  selected  transactions,  as  compared  to the implied
multiples for Concentra based on the merger  consideration  of $16.50 per share:

<TABLE>
<CAPTION>
                                                                                           MULTIPLES FOR
                                                        IMPLIED MULTIPLES OF            CONCENTRA IMPLIED BY
                                                         SELECTED COMPANIES             MERGER CONSIDERATION
                                                        ---------------------            -------------------
                                                      MEAN                RANGE
                                                      -----              ------
<S>                                                  <C>              <C>                         <C>
Adjusted Market Values:

Latest 12 months revenues                            1.3x             0.3x - 3.4x                 1.6x

Adjusted Market Values:

Latest 12 months earnings before
   interest, taxes, depreciation and
   amortization                                     11.6x            6.5x - 16.0x                8.9x
Latest 12 months earnings before
   interest and taxes                               13.1x            8.5x - 20.4x                11.2x

Equity Market Values:

Latest 12 months net income                         21.4x           15.4x - 30.5x               17.9x
One-year forward net income                         17.6x           12.7x - 21.6x               16.6x
</TABLE>

Discounted Cash Flow Analysis

     BT Alex.  Brown  performed a discounted  cash flow analysis to estimate the
present  value of the  stand-alone,  unlevered,  after-tax  free cash flows that
Concentra  could  generate  based on internal  estimates  of the  management  of
Concentra for the fiscal years 1999 through  2003.  The  stand-alone  discounted
cash flow  analysis  was  determined  by: (a) adding  the  present  value of the
projected  free cash flows over the fiscal years 1999 through  2003;  (b) adding
the present value of the estimated  terminal values in fiscal year 2003; and (c)
subtracting the current net debt for Concentra.  The range of estimated terminal
values for Concentra was calculated by applying terminal value multiples ranging
from 6.0x to 9.0x to  Concentra's  projected  fiscal year 2003  earnings  before
interest,  taxes,  depreciation and amortization.  The present value of the cash
flows and terminal values were calculated  using discount rates ranging from 15%
to 19%.  This analysis  yielded an implied range for Concentra of  approximately
$10.04 to $19.71 per share,  as compared to the merger  consideration  of $16.50
per share.

Premium  Analysis

BT Alex.  Brown analyzed the premiums paid in 84 transactions,
16  selected  healthcare  transactions  and nine  selected  healthcare  services
transactions having transaction values of between $750 million and $1.25 billion
effected since January 1, 1995,  based on the target  com-

                                       36
<PAGE>

pany's  stock  price one day and one month prior to public  announcement  of the
transaction.  This analysis  indicated  the  following  premiums in the selected
transactions,  as compared to the implied premiums in the merger one day and one
month  prior to public  announcement  of the  merger and one day prior to public
disclosure of the Federal Trade  Commission's  granting of early  termination of
WCAS's HSR Act filing in which WCAS disclosed its intention to acquire in excess
of $15 million of Concentra common stock:

<TABLE>
<CAPTION>
                                                                                               PREMIUM ONE DAY
                                                PREMIUM                    PREMIUM              PRIOR TO EARLY
                                            ONE DAY PRIOR TO          ONE MONTH PRIOR TO        TERMINATION OF
                                          PUBLIC ANNOUNCEMENT        PUBLIC ANNOUNCEMENT            WCAS'S
                                           -------------------        ------------------
                                        MEAN           RANGE          MEAN        RANGE         HSR ACT FILING
                                        -----          ------         -----       ------         -------------
<S>                                     <C>        <C>     <C>       <C>        <C>     <C>             <C>
Selected Transactions (84)             26.3%       (24.3%)-118.5%    35.3%      (27.5%)-118.5%
Selected Health Care
   Transactions (16)                   37.7%        (5.2%)-118.5%    45.5%         5.5%-118.5%
Selected Health Care
   Services Transactions (9)           34.1%          7.7%-118.5%    49.5%        18.9%-118.5%
Merger Premium Implied
   for Concentra                                            55.3%                        52.6%          161.4%
</TABLE>

                                       36

<PAGE>


OTHER FACTORS

         In rendering its opinion,  BT Alex. Brown also reviewed and considered,
among other things:

         o  historical and projected financial data for Concentra;

         o historical  market prices and trading  volumes for  Concentra  common
           stock and the  relationship  between  movements in  Concentra  common
           stock,  movements in the common stock of the selected  companies  and
           movements in the S&P 500 Index;

         o selected  analysts'  reports on Concentra,  including  calendar years
           1999 and 2000 earnings per share estimates and long-term  growth rate
           estimates of such analysts;

         o the  implied  price  per share of  Concentra  common  stock  assuming
           completion  of the merger on June 30, 1999 based on the present value
           of Concentra's terminal value at the end of fiscal year 2002; and

         o the implied equity returns to the equity  investors based on internal
           estimates of the management of Concentra assuming the merger occurs.

     The summary above is not a complete  description of the opinion of BT Alex.
Brown to the Board and special committee or the financial analyses performed and
factors considered by BT Alex. Brown in connection with its opinion,  but rather
is a summary of the material  aspects of the opinion and analyses  performed and
factors  considered  by BT Alex.  Brown in  connection  with  its


                                       37
<PAGE>

opinion.  The preparation of a fairness  opinion is a complex  analytic  process
involving various determinations as to the most appropriate and relevant methods
of financial  analyses and the  application  of those methods to the  particular
circumstances and, therefore,  a fairness opinion is difficult to summarize.  BT
Alex.  Brown believes that its analyses and the summary above must be considered
as a whole and that  selecting  portions of its analyses and factors or focusing
on information  presented in tabular format without considering all analyses and
factors or the narrative  description  of the analyses could create a misleading
or incomplete  view of the processes  underlying BT Alex.  Brown's  analyses and
opinion.

     In performing its analyses,  BT Alex. Brown made numerous  assumptions with
respect  to  industry  performance,   general  business,  economic,  market  and
financial conditions and other matters,  many of which are beyond the control of
Concentra.  No  company,  transaction  or  business  used in such  analyses as a
comparison  is  identical  to  Concentra  or  the  proposed  merger,  nor  is an
evaluation of the results of those analyses entirely  mathematical;  rather, the
analyses involve complex  considerations and judgments  concerning financial and
operating characteristics and other factors that could affect the merger, public
trading or other  values of the  companies,  business  segments or  transactions
being analyzed.  The estimates  contained in BT Alex.  Brown's  analyses and the
ranges of valuations  resulting from any particular analysis are not necessarily
indicative of actual values or future results,  which may be significantly  more
or less favorable than those  suggested by its analyses.  In addition,  analyses
relating  to  the  value  of  businesses  or  securities  do not  purport  to be
appraisals or to reflect the prices at which  businesses or securities  actually
may be sold. Accordingly, BT Alex. Brown's analyses and estimates are inherently
subject to substantial uncertainty.

     BT Alex. Brown is an  internationally  recognized  investment  banking firm
and, as a customary part of its investment  banking business,  is engaged in the
valuation of businesses  and their  securities  in  connection  with mergers and
acquisitions,  negotiated  underwritings,  private placements and valuations for
estate,  corporate  and other  purposes.  Concentra  and the  special  committee
selected BT Alex.  Brown based on BT Alex.  Brown's  reputation,  expertise  and
familiarity  with Concentra.  BT Alex. Brown and its affiliates have in the past
provided financial  services to Concentra and WCAS and its affiliates  unrelated
to the proposed  merger,  for which  services BT Alex.  Brown and its affiliates
have received  compensation.  For the period from January 1, 1997 to the date of
this proxy  statement,  BT Alex.  Brown has advised WCAS and its  affiliates  in
twelve  transactions,  for which  advisory  service BT Alex.  Brown has received
approximately  $36.5  million.  BT Alex.  Brown  maintains a market in Concentra
common stock and regularly  publishes  research reports regarding the businesses
and  securities  of  Concentra  and  other  publicly  traded  companies  in  the
healthcare industry.  In the ordinary course of business, BT Alex. Brown and its
affiliates may actively trade or hold the securities and other  instruments  and
obligations of Concentra for their own account and for the accounts of customers
and,  accordingly,  may at any  time  hold a long  or  short  position  in  such
securities,  instruments or obligations.  For the period from January 1, 1997 to
the date of this proxy  statement,  BT Alex.  Brown has advised  WCAS and WCAS's
affiliates in twelve transactions and BT Alex. Brown has received  approximately
$36.5 million in connection with such advisory services.

     The type and amount of  consideration  payable in the merger was determined
through negotiation between Concentra and WCAS. BT Alex. Brown did not recommend
the amount of  consideration  to be paid to the Concentra  common  stockholders.
Although BT Alex. Brown provided


                                       38
<PAGE>

financial advice to Concentra during the course of negotiations, the decision to
enter into the merger was solely  that of the Board and  special  committee.  BT
Alex.  Brown's  opinion and  financial  analyses  were only one of many  factors
considered  by the  Board  and  special  committee  in their  evaluation  of the
proposed  merger and should not be viewed as  determinative  of the views of the
Board,  special committee or management with respect to the merger consideration
or the merger.

     Pursuant to the terms of BT Alex. Brown's engagement,  Concentra has agreed
to pay BT Alex.  Brown  upon  completion  of the merger an  aggregate  financial
advisory  fee  equal  to  0.75%  of  the  aggregate   consideration,   including
liabilities  assumed,  payable  in  connection  with the  merger.  In  addition,
Concentra has agreed to reimburse BT Alex.  Brown for its reasonable  travel and
other  out-of-pocket  expenses,  including  reasonable fees and disbursements of
counsel,   and  to  indemnify  BT  Alex.   Brown  and  related  parties  against
liabilities,  including  liabilities under the federal securities laws, relating
to, or arising out of, its engagement. BT Alex. Brown's opinion is available for
inspection and copying at  Concentra's  principal  executive  offices during its
regular business hours.

PURPOSE AND REASONS OF WCAS AND THE MEMBERS OF MANAGEMENT FOR THE MERGER

     WCAS's  and  the  Members  of  Management's  purpose  in  engaging  in  the
transactions  contemplated by the merger  agreement is to enable WCAS and Ferrer
Freeman  to  acquire  100%  ownership  of  Concentra.  WCAS and the  Members  of
Management  believe  that as a  private  company  Concentra  will  have  greater
operating  flexibility to focus on enhancing  value by emphasizing  growth (both
internally  and  through  acquisitions)  and  operating  cash flow  without  the
constraint  of  the  public  market's  emphasis  on  quarterly  earnings.   This
assessment  by WCAS  and the  Members  of  Management  is  based  upon  publicly
available information regarding Concentra, WCAS's due diligence investigation of
Concentra  and WCAS's  experience  in investing  in companies in the  healthcare
industry.  While WCAS and the Members of  Management  believe that there will be
significant opportunities associated with an investment in Concentra,  there are
also substantial risks that such  opportunities may not be fully realized.

     As a result of the  merger,  WCAS will  acquire a 93  percent  interest  in
Concentra and will invest approximately  $392,432,000 in equity financing and up
to $110,000,000 in subordinated  indebtedness and has received  commitments from
various  lenders to provide  financing of  $190,000,000  in senior  subordinated
notes,  $375,000,000 in term loans and a $100,000,000 revolving credit facility.
The Members of Management will acquire a portion of these shares. Ferrer Freeman
will invest  approximately  $30,600,000 in equity in exchange for an approximate
seven percent interest in Concentra. In addition, certain members of Concentra's
current management will have amended and restated employment agreements with the
surviving corporation.

Position of WCAS and the Members of Management as to Fairness of the Merger

     WCAS and the  Members  of  Management  have  considered  the  analyses  and
findings of the special  committee and the Board (described in detail in "-- The
Special  Committee's  and  the  Board's  Recommendation")  with  respect  to the
fairness  of the  merger to  Concentra's  stockholders,  other than WCAS and its
affiliates.  Each of the Members of Management  and WCAS adopts


                                       39
<PAGE>

the analysis and findings of the special committee and the Board with respect to
the fairness of the merger,  adopts the analysis of BT Alex.  Bronx described in
"Opinion of Concentra's  Financial  Advisor," and believes that the merger,  the
merger agreement and the transactions  contemplated  thereby are fair and in the
best  interests  of  Concentra's  common  stockholders.  Each of the  Members of
Management  intends to vote all shares he owns in favor of the merger agreement.
In a letter  agreement  dated  March 24,  1999,  WCAS agreed to and to cause its
affiliates to vote all shares of Concentra  common stock owned by WCAS or any of
its  affiliates  in  favor  of the  merger.  Neither  WCAS  nor the  Members  of
Management  make any  recommendation  as to how you  should  vote on the  merger
agreement.  WCAS has  financial  interests in the merger and certain  members of
Concentra's  management  have financial and employment  interests in the merger.
See "Special Factors -- Interests of Certain Persons in the Merger."

INTERESTS OF CERTAIN PERSONS IN THE MERGER

     In considering the  recommendations  of the Board, you should be aware that
certain members of the Board and certain of Concentra's  executive officers have
certain  interests  in the merger  that are in  addition  to your  interest as a
Concentra stockholder generally.

     Employment  Agreements.  Yankee  and each of  Daniel  J.  Thomas,  James M.
Greenwood,  Richard A. Parr II, W. Tom Fogarty,  M.D. and Kenneth  Loffredo have
agreed that at or prior to the effective  time of the merger they will amend and
restate  the  existing  employment   agreements  between  such  individuals  and
Concentra.  Concentra will enter into a new employment  agreement with Thomas E.
Kiraly on substantially the same terms as detailed below. The principal terms of
the amended and restated employment agreements are as follows:

     o each  agreement  would  have a term of two years,  subject  to  automatic
       renewal for additional  one-year terms,  unless  terminated in accordance
       with the agreement's terms;

     o each agreement would provide for  compensation  consisting of base salary
       amounts,  bonuses  at  the  discretion  of the  Board  of  Concentra  and
       participation  in any employee  benefit plan adopted by Concentra for its
       employees;

     o each  agreement  would  provide for a  severance  payment in the event of
       termination by Concentra without cause or resignation by the employee for
       good reason  consisting  of two years' base salary for Mr. Thomas and one
       year's base  salary for  Messrs.  Greenwood,  Kiraly,  Parr,  Fogarty and
       Loffredo; provided, however, if termination by Concentra occurs within 12
       months following the merger, each agreement would provide for a severance
       payment  consisting of two and one half years' base salary for Mr. Thomas
       and two years' base salary for each of Messrs.  Greenwood,  Kiraly, Parr,
       Fogarty and Loffredo.

     STOCK  OPTIONS AND  RESTRICTED  STOCK.The  merger  agreement  provides that
Concentra will use its best efforts to effect the  cancellation  or amendment at
the effective time of the merger of all outstanding options to acquire Concentra
common stock in exchange  for a cash  payment  equal to $16.50 less the exercise
price per share of such  option.  If all of the  options  to  acquire  Concentra
common stock were exchanged for cash as described above, the executive  officers
and other key


                                       40
<PAGE>

executives of Concentra  would be entitled to a maximum  aggregate
cash payment of $7,530,000 and the directors of Concentra would be entitled to a
maximum  aggregate  cash  payment of  $1,447,241.  In  addition,  the  executive
officers and other key  executives  of Concentra  will be granted new options to
acquire up to 10.5% of Concentra  common stock  following  the merger at a price
per share of $16.50.  Some of these new options will be  non-qualified  and vest
20% per year over a five year period  while other new options will vest upon the
achievement   of  certain   performance   criteria.

     Officers' And Directors'  Indemnification  Insurance.  The merger agreement
provides that, for a period of six years after the effective time, the surviving
corporation will indemnify the present and former officers, directors, employees
and agents of Concentra and its  subsidiaries  from  liabilities  arising out of
actions or omissions in their  capacity as such prior to the  effective  time of
the merger,  to the full extent  permitted  under Delaware law or as provided in
Concentra's  or  its  subsidiaries'  organizational  documents  or  any  written
indemnification  agreements.  In addition,  the  surviving  entity will maintain
directors'  and officers'  insurance  coverage for six years after the effective
time on  terms no less  favorable  to such  indemnified  parties  than  existing
insurance coverage, but the surviving corporation will not be required to pay an
annual  premium in excess of 200% of the last  premium paid prior to the date of
the merger agreement.

     Relationships  With WCAS. An investment  partnership  affiliated  with WCAS
purchased   securities  of  OccuSystems,   Inc.   ("OccuSystems")   in  separate
transactions  prior to OccuSystems'  initial public offering in May 1995. In May
1992, the partnership  purchased 51,550 shares of convertible preferred stock of
OccuSystems  for $5,155,000 in cash and became an affiliate of  OccuSystems.  In
June 1992, the partnership  purchased  30,950  additional  shares of convertible
preferred  stock of  OccuSystems  for  $3,095,000 in cash. In December 1992, the
partnership  and  certain  of  its  affiliates  purchased  1,568,333  shares  of
OccuSystems  common stock for  $5,881,249  and the 82,500 shares of  convertible
preferred  stock were  converted into  2,391,304  shares of  OccuSystems  common
stock.  In  November  1992,  the  partnership   purchased  a  $6,000,000  senior
subordinated   note  of  OccuSystems  for  $6,000,000.   In  January  1993,  the
partnership  purchased a $6,000,000 senior  subordinated note of OccuSystems for
$5,118,750.  In  June  1993,  the  partnership  purchased  1,600,000  shares  of
convertible preferred stock of OccuSystems for $8,000,000. Between June 1994 and
1995, the 1,600,000  shares of convertible  preferred stock of OccuSystems  were
converted into 1,600,000 shares of OccuSystems  common stock.  Immediately prior
to  OccuSystems'  initial public  offering,  the  partnership and certain of its
affiliates  owned 40.9% of  OccuSystems'  common  stock;  immediately  after the
offering,  they owned 27.7% of  OccuSystems'  common stock. By January 21, 1997,
the  partnership  had  sold  and/or  distributed  to  its  partners  all  of its
OccuSystems common stock.

     John K. Carlyle, a director of Concentra,  has served as Concentra's acting
Chairman since September  1998. Mr. Carlyle also served as Concentra's  Chairman
from August 1997 to January 1998 and since September 1998 to the present.  Prior
to the formation of Concentra  resulting from the merger of OccuSystems  and CRA
Managed Care, Inc. in August 1997, Mr. Carlyle was OccuSystems'  Chief Executive
Officer from 1991 to August 1997. An investment partnership affiliated with WCAS
currently owns approximately 40% of the common stock, on a fully-diluted  basis,
of MAGELLA  Healthcare  Corporation,  a neonatology and  perinatology  physician
prac-


                                       41
<PAGE>

tice  management  company of which Mr.  Carlyle is the  President  and Chief
Executive  Officer.  Two general partners of WCAS serve on the board of MAGELLA.
Mr.  Carlyle  owns  approximately  7% of  the  common  stock  of  MAGELLA,  on a
fully-diluted basis. Mr. Carlyle has invested $90,000 in Amcomp Corporation. Two
general partners of WCAS serve on the board of Amcomp. On a fully-diluted basis,
WCAS owns  approximately  30% of the common stock of Amcomp and Mr. Carlyle owns
less than one percent of the common stock of Amcomp.  In addition,  Mr.  Carlyle
previously invested $50,000 in Ortholink Physicians Corporation, an affiliate of
WCAS; Mr. Carlyle currently has no investment in Ortholink. Two general partners
of WCAS serve on the board of Ortholink.  On a  fully-diluted  basis,  WCAS owns
approximately  21% of the common stock of Ortholink.  In addition,  Mr.  Carlyle
invested  approximately  $160,000  to  purchase a  partnership  interest in WCAS
Healthcare Partners,  L.P., a partnership affiliated with WCAS. Mr. Carlyle owns
less than one percent of the limited  partnership  interests of WCAS  Healthcare
Partners, L.P.

     Robert  A.  Ortenzio  currently  serves  as  President  of  Select  Medical
Corporation.  Two general  partners of WCAS serve on the board of Select Medical
Corporation.  WCAS owns  approximately 44% of the common stock of Select Medical
Corporation on a fully-diluted basis. Mr. Ortenzio  beneficially owns 10% of the
common  stock of  Select  Medical  Corporation  on a  fully-diluted  basis.  Mr.
Ortenzio  is a  director  of both  Centennial  Healthcare  Corporation  and U.S.
Oncology,  Inc.  One general  partner of WCAS serves on the board of  Centennial
Healthcare  Corporation.  WCAS and Mr. Ortenzio own  approximately  23% and less
than one percent,  respectively,  of the common stock of  Centennial  Healthcare
Corporation on a fully-diluted  basis. One general partner of WCAS serves on the
board of U.S. Oncology, Inc. WCAS and Mr. Ortenzio own approximately 2% and less
than one percent,  respectively, of the common stock of U.S. Oncology, Inc. on a
fully-diluted  basis. Limited partnerships of which Mr. Ortenzio is an affiliate
invested  $83,000 in Amcomp  Corporation and $1,980,355 in  OccuSystems,  Inc. A
partnership  affiliated  with Mr.  Ortenzio has also invested in U.S.  Oncology,
Inc. Mr.  Ortenzio  does not, and never has,  owned more than one percent of the
outstanding common stock on a fully-diluted basis of Amcomp, OccuSystems or U.S.
Oncology. In addition,  Mr. Ortenzio invested $150,000 to purchase a partnership
interest in WCAS  Healthcare  Partners,  L.P.  Mr.  Ortenzio  owns less than one
percent of the limited partnership  interests in WCAS Healthcare Partners,  L.P.
Mr. Ortenzio has a remainderman  interest in an $83,000  investment in interests
of Welsh,  Carson,  Anderson and Stowe VI, L.P. The partnership  affiliated with
Mr. Ortenzio also invested  $300,000 to purchase  partnership  interests in WCAS
Capital Partners II, L.P. Mr. Ortenzio owns less than one percent of the limited
partnership interests in. each of Welsh, Carson, Anderson and Stowe VI, L.P. and
WCAS Capital  Partners II, L.P.  Mr.  Ortenzio  joined the board of directors of
OccuSystems in May 1992 when he was designated by WCAS under a voting  agreement
between WCAS and OccuSystems.

     OccuSystems  employed  Daniel J. Thomas as its Executive Vice President and
Chief Operating  Officer in April 1993. Mr. Thomas was elected President and COO
of Concentra in January 1998. At that time,  Paul Queally,  a general partner of
WCAS, was a member of the board of OccuSystems and WCAS and its affiliates owned
less than one  percent of the common  stock of  OccuSystems  on a  fully-diluted
basis.  Mr.  Thomas,  a director  of  Concentra,  is also a  director  of Amcomp
Corporation.   Mr.   Thomas  has  invested   approximately   $90,000  in  Amcomp
Corporation. Mr. Thomas owns less than one percent of the common stock of Amcomp

                                       42
<PAGE>

Corporation  on a  fully-diluted  basis.  Mr. Thomas has invested  approximately
$50,000 in Ortholink;  Mr. Thomas owns less than one percent of the common stock
of  Ortholink.  In  addition,  Mr.  Thomas  invested  approximately  $150,000 to
purchase a partnership  interest in WCAS  Healthcare  Partners,  L.P. Mr. Thomas
owns  less  than  one  percent  of the  limited  partnership  interests  of WCAS
Healthcare Partners, L.P.

     Richard D. Rehm,  M.D., has invested  approximately  $160,000 to purchase a
partnership interest in WCAS Healthcare  Partners,  L.P. Dr. Rehm owns less than
one percent of the limited  partnership  interests of the partnership.  Dr. Rehm
has invested $50,000 in Amcomp Corporation.  On a fully-diluted  basis, Dr. Rehm
owns less than one  percent of the  common  stock of  Amcomp.  Dr.  Rehm was the
chairman and founder of OccuSystems.

     Paul Queally,  a general partner of WCAS, served on Concentra's Board until
May 1998.

     Investment In Concentra. The Members of Management have agreed to acquire a
portion  of WCAS's  interest  in  Concentra  upon  consummation  of or after the
merger,  but will be less than two  percent  of the  common  stock of  Concentra
outstanding  immediately  following the merger.  The exact  interest  Members of
Management will hold after the merger has not yet been  determined.

     Payments to Advisors.  Donaldson, Lufkin & Jenrette has previously provided
advisory  services to WCAS and Concentra and has in each instance charged market
rates for the services rendered.  Similarly,  BT Alex. Brown has also previously
provided advisory services to Concentra, WCAS and its affiliates at market rates
for services rendered.  Neither Donaldson,  Lufkin & Jenrette nor BT Alex. Brown
believe that the foregoing  arrangements  affect their ability to  independently
and impartially evaluate this merger.

CERTAIN BENEFITS AND DETRIMENTS OF THE MERGER

     As a result of the merger,  the entire equity interest in Concentra will be
owned by WCAS, Ferrer Freeman and Members of Management  through their ownership
of Yankee capital stock. After the merger is complete,  Concentra's officers who
are  currently  subject to  Section  16(b) of the  Exchange  Act will be granted
options to  acquire  up to 3% of  Concentra's  common  stock on a fully  diluted
basis. You will no longer have any interest in, and will not be stockholders of,
Concentra, and therefore will not participate in Concentra's future earnings and
potential  growth.  Instead,  you will have the right to receive $16.50 in cash,
without  interest,  for each share held  (other  than shares in respect of which
appraisal  rights  have been  perfected).  An  equity  investment  in  Concentra
following  the  merger  involves  substantial  risk  resulting  from the  future
borrowings  that will be required to purchase  the  Concentra  common stock from
Concentra's  stockholders and to fund the capital  expenditures and acquisitions
necessary to execute  Concentra's  business  strategy.  Concentra's  substantial
leverage following the merger may:

     o make it more difficult for Concentra to satisfy its debt obligtations;

     o increase  Concentra's  vulnerability  to  general  adverse  economic  and
       industry conditions;

     o require Concentra to dedicate a substantial portion of its cash flow from
       operations to


                                       43
<PAGE>

       payments on its indebtedness and therefore limit  Concentra's  ability to
       fund future  working  capital,  capital  expenditures  and other  general
       corporate requirements;

     o limit Concentra's flexibility in planning for, or reacting to, changes in
       its  business  and  the  healthcare  industry;  o  place  Concentra  at a
       competitive disadvantage compared to companies with less debt;

     o limit,  along with the financial and other restrictive  convenants in its
       indebtedness, Concentra's ability to borrow additional funds; and

     o limit  Concentra's  ability  to engage in  various  transactions  such as
       acquisitions and dispositions or to make certain investments.

     Nonetheless,  if Concentra successfully executes its business strategy, the
value of an equity  investment  could be considerably  greater than its original
cost.  See "--  Conflicts  of Interest"  and  "Cautionary  Statement  Concerning
Forward-looking Information."

     In connection  with the merger,  the Members of Management  are entitled to
receive  cash  amounts in  connection  with the  exercise  of stock  options and
restricted stock grants. See "Special  Factors--Interests  of Certain Persons in
the Merger." Mr.  Thomas is entitled to receive  approximately  $2,262,500;  Mr.
Greenwood is entitled to receive approximately $408,400; Mr. Fogarty is entitled
to receive approximately $505,500; Mr. Parr is entitled to receive approximately
$124,000;  Mr. Loffredo is entitled to receive approximately  $151,000;  and Mr.
Carlyle is entitled to receive approximately  $504,000. None of such individuals
will receive any other  payments in connection  with the merger.  The Members of
Management  and  WCAS  are  still  negotiating  the  terms  of  the  Members  of
Management's  future investment in Concentra and it is possible that one or more
of the Memebers of  Management  will acquire an equity  interest in Concentra in
lieu of receiving these cash amounts.

     If  the  merger  is  consummated,  WCAS  will  be  entitled  to  receive  a
transaction  fee from  Concentra  in the amount of $10.5  million  for  advisory
services in connection  with the financing and completion of the merger.  If the
merger agreement is terminated under the circumstances  requiring the payment of
a  termination  fee as  described in "The Merger  Agreement--Termination  of the
Merger Agreement," WCAS will be entitled to receive from Concentra a termination
fee in the  amount  of $25  million  in the  aggregate  and up to an  additional
$4,000,000 to reimburse WCAS for its out-of-pocket expenses.

     In addition,  the Concentra common stock will no longer be traded on Nasdaq
and price  quotations for sales of shares in the public market will no longer be
available.  The  registration of the Concentra common stock under the Securities
Exchange Act of 1934 will  terminate and Concentra  will no longer file periodic
or annual reports.

                                       44
<PAGE>

Financing of The Merger

     It is estimated  that  approximately  $1,118.0  million will be required to
consummate the merger,  repurchase Concentra's existing convertible subordinated
notes dues 2001 and 2003 and pay  related  fees and  expenses.  These  funds are
expected to come from the following sources:

     o an equity investment by WCAS of approximately $370.1 million,

     o an equity investment by Ferrer Freeman of approximately $30.6 million,

     o an equity investment by Chase Capital Partners, affiliates of DLJ and the
       Members of Management of approximately $23.0 million;

     o borrowings by Concentra Operating Corporation,  a wholly-owned subsidiary
       of Concentra ("Operating Company"), of approximately $375.0 million under
       new credit facilities (the "New Credit Facilities");

     o borrowings by Operating Company of approximately  $190.0 million from the
       issuance of senior subordinated notes (the "Senior Subordinated Notes");

     o borrowings by Concentra of approximately $110.0 million from the issuance
       of senior discount debentures (the "Discount Notes"); and

     o $71.6 million from Concentra's available cash reserves.

     The merger is subject to a financing  contingency  which states that Yankee
is not  obligated  to perform  its  obligations  under the merger  agreement  if
financing cannot be obtained on terms no less favorable in material  respects to
the terms stated in the financing commitments.

     Senior  Subordinated Notes. We anticipate that Operating Company will raise
approximately $190.0 million of the funds necessary to consummate the merger and
related  transactions  through the issuance of the Senior  Subordinated Notes in
the private capital markets. Donaldson, Lufkin & Jenrette Securities Corporation
and Chase  Securities  Inc. have each provided WCAS with letters dated  February
24, 1999 stating that they are highly  confident,  subject to the assumptions in
those letters,  that Operating Company will be able to raise the necessary funds
from the issuance of such Senior  Subordinated  Notes.  We  anticipate  that the
Senior Subordinated Notes will be:

     o subordinated to the New Credit Facilities;

     o have registration rights;

     o redeemable  by Operating  Company  after 2004,  or up to 35% of the notes
       will be redeemable by Concentra  with the net proceeds from certain sales
       of equity;

                                       45
<PAGE>

     o redeemable  by  Operating  Company  at the option of the  holders  upon a
       change of control; and

     o subject to customary covenants for this type of financing, including, but
       not limited to, restrictions on indebtedness, dividends, liens, affiliate
       transactions, stock repurchases, assets sales and mergers.

     Discount Notes. We anticipate that Concentra,  as the surviving corporation
in the merger, will raise approximately $110.0 million of the funds necessary to
consummate  the merger and  related  transactions  through  the  issuance of the
Discount Notes in the private capital markets. The Discount Notes will be issued
with warrants to purchase  Concentra  common stock at a nominal  exercise price.
Chase Capital Partners and WCAS have provided binding commitments in the form of
commitment letters dated February 24, 1999 and March 1, 1999,  respectively,  to
purchase the Discount  Notes from  Concentra.  Concentra will not be required to
pay any  interest  on the  Discount  Notes until 2004.  We  anticipate  that the
Discount Notes will be or have:

     o structurally  subordinated  to the New Credit  Facilities  and the Senior
       Subordinated Notes;

     o have registration rights;

     o redeemable by Concentra after July 2004;

     o redeemable,  with regard to up to 35% of the accreted value of the notes,
       by Concentra  at any time prior to July 2002 with the net  proceeds  from
       certain sales of equity;

     o redeemable  by  Concentra  at the option of the holders  upon a change of
       control; and

     o subject to  customary  covenants  for this type of  financing,  including
       restrictions on indebtedness,  dividends,  liens, affiliate transactions,
       stock repurchases,  assets sales and mergers.

     New Credit  Facilities.  We anticipate  that  Operating  Company will raise
approximately $375.0 million of the funds necessary to consummate the merger and
related transactions  through borrowings under the New Credit Facilities.  Chase
Securities  Inc., The Chase Manhattan Bank, DLJ Capital  Funding,  Inc.,  Credit
Suisse First Boston and Fleet  National Bank have provided a binding  commitment
to provide the funds for the New Credit  Facilities  in the form of a commitment
letter dated February 26, 1999 (the "Bank  Commitment  Letter").  It is expected
that the New Credit Facilities will include, provide or be:

     o $375.0 million of term loan facilities;

     o a $100.0 million revolving loan facility;

                                       46
<PAGE>

     o terms  of  six  to  eight  years;

     o guaranteed  by  Concentra  and its  subsidiaries,  other  than its  joint
       ventures;

     o loans may be prepaid and commitments may be reduced in certain amounts;

     o prepayment  will be mandatory with the net proceeds from certain sales of
       equity,  incurrence of certain  indebtedness  and certain asset sales and
       with 50% of excess cash flow;

     o secured by a  perfected  interest  in  substantially  all of  Concentra's
       Operating  Company's  and their  subsidiaries'  tangible  and  intangible
       assets;

     o customary representations and warranties; and

     o subject to customary covenants,  including,  but not limited to, delivery
       of financial  statements,  reports,  accountants'  letters,  projections,
       officers'   certificates,   payment   of  other   material   obligations,
       continuation of business,  compliance with laws,  maintenance of property
       and insurance,  maintenance of books and records, litigation,  compliance
       with   environmental   laws,   further   assurances  and  limitations  on
       indebtedness,  liens,  guarantee  obligations,  mergers, sales of assets,
       leases, dividends, capital expenditures,  investments, optional payments,
       transactions with affiliates,  sale and leasebacks and changes in sale of
       business.

     The  foregoing  is only a  summary  of the Bank  Commitment  Letter  and is
qualified  in  its  entirety  by  reference  to the  actual  terms  of the  Bank
Commitment Letter, which is filed as an exhibit to Concentra's Schedule 13E-3 of
which this Proxy Statement is a part.

     Definitive  agreements for the issuance and sale of the Senior Subordinated
Notes, the Discount Notes and the New Credit Facilities have not been negotiated
or completed.  Accordingly,  the terms of such arrangements  described above may
change as a result of the  negotiation  of definitive  agreements.  In addition,
each of the  financings  described  above  is  subject  to the  satisfaction  of
numerous customary conditions,  including the condition that no material adverse
change to Concentra  has occurred and that the merger has been  consummated.  We
intend  to repay the debt  discussed  above  with cash flow from our  continuing
operations.

Conduct of Concentra's Business After the Merger

     WCAS is continuing to evaluate Concentra's business, practices, operations,
properties,  corporate  structure,  capitalization,  management and personnel to
determine  what changes,  if any, will be desirable.  Subject to the  foregoing,
WCAS expects that the day-to-day  business and operations of Concentra after the
merger will be conducted  substantially as they are currently being conducted by
Concentra.  WCAS does not currently intend to dispose of any assets of Concentra
other  than in the  ordinary  course of  business.  Additionally,  WCAS does not
currently  contemplate  any material  change in the  composition  of Concentra's
current management, although after the merger,


                                       47
<PAGE>

the Board will consist of Messrs.  John K.  Carlyle,  Russell L. Carson,  Carlos
Ferrer, D. Scott Mackesy, Steve Nelson, Andrew M. Paul, Paul B. Queally,  Daniel
J. Thomas and Sean M. Traynor.

MATERIAL FEDERAL INCOME TAX CONSEQUENCES

     The  following  discussion  summarizes  the  material  federal  income  tax
considerations  relevant to the merger that are generally  applicable to holders
of Concentra  common  stock.  This  discussion  is based on  currently  existing
provisions  of the  Internal  Revenue  Code of 1986,  as amended  (the  "Code"),
existing and proposed Treasury Regulations thereunder and current administrative
rulings  and court  decisions,  all of which are  subject  to  change.  Any such
change, which may or may not be retroactive, could alter the tax consequences to
the  holders  of  Concentra  common  stock  as  described  herein.  Special  tax
consequences  not described  below may be  applicable  to particular  classes of
taxpayers, including financial institutions, broker-dealers, persons who are not
citizens or  residents  of the United  States or who are  foreign  corporations,
foreign partnerships or foreign estates or trusts, persons who will own stock of
Concentra  (actually or  constructively,  under certain  constructive  ownership
rules in the Code)  after the  merger,  and  holders  who  acquired  their stock
through the exercise of an employee stock option or otherwise as compensation.

     The  receipt  of the  merger  consideration  in the  merger by  holders  of
Concentra  common  stock will be a taxable  transaction  for federal  income tax
purposes. Each holder's gain or loss per share of Concentra common stock will be
equal to the difference between $16.50 and the holder's basis in that particular
share of the  Concentra  common  stock.  Such gain or loss  generally  will be a
capital  gain or loss.  In the case of  individuals,  trusts and  estates,  such
capital  gain will be  subject to a maximum  federal  income tax rate of 20% for
shares of Concentra  common stock held for more than 12 months prior to the date
of  disposition.

     A holder of Concentra common stock may be subject to backup  withholding at
the rate of 31% with respect to merger  consideration  received  pursuant to the
merger,  unless the holder (i) is a  corporation  or comes within  certain other
exempt categories and, when required,  demonstrates this fact or (ii) provides a
correct taxpayer identification number ("TIN"),  certifies concerning no loss of
exemption  from  backup  withholding  and  otherwise  complies  with  applicable
requirements  of the backup  withholding  rules.  To prevent the  possibility of
backup federal income tax withholding on payments made with respect to shares of
Concentra  common  stock  pursuant to the merger,  each holder must  provide the
exchange agent with his current TIN by completing a Form W-9 or Substitute  Form
W-9. A holder of Concentra common stock who does not provide  Concentra with his
or her correct TIN may be subject to penalties  imposed by the Internal  Revenue
Service (the "IRS"),  as well as backup  withholding.  Any amount withheld under
these  rules  will  be  creditable  against  the  holder's  federal  income  tax
liability.  Concentra  (or its agent) will  report to the  holders of  Concentra
common stock and the IRS the amount of any "reportable  payments," as defined in
Section 3406 of the Code,  and the amount of tax, if any,  withheld with respect
thereto.

     The foregoing tax discussion is included for general  information  only and
is based upon  present  law.  The  foregoing  discussion  does not  discuss  tax
consequences under the laws of


                                       48
<PAGE>

states or local  governments or any other  jurisdiction  or tax  consequences to
categories of stockholders that may be subject to special rules, such as foreign
persons,  tax-exempt entities,  insurance companies,  financial institutions and
dealers in stocks and securities. The foregoing discussion may not be applicable
to a  stockholder  who  acquired  his or her shares of  Concentra  common  stock
pursuant to the exercise of stock  options or otherwise  as  compensation.  Each
holder of Concentra  common stock should  consult such  holder's own tax advisor
concerning the specific tax consequences of the merger to such holder, including
the application and effect of federal,  state,  local and other tax laws and the
possible effect of changes in such tax laws.

                                       49
<PAGE>



                              THE SPECIAL MEETING

DATE, TIME AND PLACE OF THE SPECIAL MEETING

The special meeting will be held on ___________,  1999 at 10:00 a.m., local time
at _________________.

MATTERS TO BE CONSIDERED AT THE SPECIAL MEETING

     The purpose of the special  meeting is to consider and vote upon a proposal
to approve and adopt an Amended and Restated Agreement and Plan of Merger, dated
as  of  March  24,  1999,  by  and  between  Yankee,  a  newly-formed   Delaware
corporation,  and Concentra.  Pursuant to the merger  agreement,  Yankee will be
merged with and into Concentra and each  outstanding  share of Concentra  common
stock  will be  converted  into the right to  receive  $16.50  in cash,  without
interest,  other than shares of Concentra  common stock held by stockholders who
are entitled to and have perfected their dissenters'  appraisal  rights.  Shares
held by  Concentra,  its  subsidiaries,  and  Yankee or its  affiliates  will be
canceled in the  merger.  Accordingly,  upon  consummation  of the  merger,  the
current  shares of  Concentra  common  stock will cease to  represent  ownership
interests in Concentra.

     The Board has determined  that the merger is fair to,  advisable and in the
best interests of the stockholders of Concentra and has approved and adopted the
merger  agreement.  The Board  unanimously  recommends that the  stockholders of
Concentra vote FOR approval and adoption of the merger agreement.

PROXY SOLICITATION

     Concentra  is  soliciting  your proxy  pursuant  to this  proxy  statement.
Concentra will pay all expenses  incurred in connection with solicitation of the
enclosed  proxy.  Officers,  directors  and regular  employees of Concentra  may
solicit  proxies in person or by  telephone.  They will  receive  no  additional
compensation for their services. In addition, Concentra has retained Georgeson &
Company Inc. to solicit  proxies for a fee of $10,000 plus  expenses.  Concentra
has requested brokers and nominees who hold stock in their names to furnish this
proxy statement to their  customers,  and Concentra will reimburse these brokers
and nominees for their related out-of-pocket  expenses. This proxy statement and
the  accompanying  proxy  card are  being  mailed  to  stockholders  on or about
____________, 1999.

RECORD DATE AND QUORUM REQUIREMENT

The Concentra common stock is the only outstanding voting security of Concentra.
The Board has fixed the close of business on _______________, 1999 as the record
date for the  determination  of stockholders  entitled to notice of, and to vote
at, the special  meeting and any  adjournments or  postponements  of the special
meeting.  If you hold  Concentra  common  stock at the close of  business on the
record  date,  you will be  entitled to one vote for each share you hold on each


                                       50
<PAGE>

matter  submitted  to a vote of  stockholders.  At the close of  business on the
record  date,  there were _____  shares of  Concentra  common  stock  issued and
outstanding held by _______ holders of record.

     The holders of a majority of the outstanding shares entitled to vote at the
special  meeting must be present in person or represented by proxy to constitute
a quorum for the transaction of business. Abstentions are counted as present for
purposes of determining  the presence or absence of a quorum for the transaction
of business.

VOTING PROCEDURES

     Approval of the merger  agreement,  which is attached as Appendix A hereto,
will  require  the  affirmative  vote  of  the  holders  of a  majority  of  the
outstanding shares of Concentra common stock, whether affiliated or unaffiliated
with  Concentra,  entitled  to vote at the special  meeting.  WCAS has agreed to
vote, and to cause its affiliates to vote, all shares of Concentra  common stock
owned by WCAS or any of its affiliates  for and against the merger  agreement in
the same proportion that the public  stockholders of Concentra vote their shares
for and against the merger  agreement.  If you fail to vote, or vote to abstain,
it will have the same legal effect as a vote cast against approval.  Your broker
and, in many cases,  your nominee will not have  discretionary  power to vote on
the  proposal to be presented at the special  meeting.  Accordingly,  you should
instruct  your broker or nominee how to vote.  A broker  non-vote  will have the
same effect as a vote against the merger.

     If there are  insufficient  votes to approve  the merger  agreement  at the
special meeting, your proxy may be voted to adjourn the special meeting in order
to solicit  additional  proxies in favor of approval of the merger  agreement if
you voted in favor of the merger  agreement or gave no voting  instructions.  If
the special meeting is adjourned or postponed for any purpose, at any subsequent
reconvening of the special meeting,  your proxy will be voted in the same manner
as it would have been voted at the original  convening of the meeting unless you
withdraw or revoke  your proxy.  Your proxy may be voted this way even though it
may have been voted on the same or any other matter at a previous meeting.

     Under Delaware law, if you do not vote in favor of the merger agreement and
comply with certain notice requirements and other procedures,  you will have the
right to  dissent  and to be paid  cash for the "fair  value" of your  shares as
finally determined under such procedures. This payment may be more, the same as,
or less than the consideration to be received by other stockholders of Concentra
under the terms of the merger  agreement.  If you fail to follow such procedures
precisely,  you may lose  your  appraisal  rights.  See  "Rights  of  Dissenting
Stockholders."

     Concentra  is subject to the  provisions  of  Section  203 of the  Delaware
General  Corporation  Law (the  "DGCL").  Section  203  provides,  with  certain
exceptions,  that a Delaware  corporation  may not  engage in  certain  business
combinations  with a person or an affiliate or associate of the person who is an
"interested  stockholder"  for a period of three  years from the date the person
became an interested  stockholder  unless,  among other things,  on or after the
date the person becomes an interested  stockholder,  the business combination is
approved by the corporation's  board of directors and by the holders of at least
two-thirds of the corporation's outstanding voting stock at an annual or special
meeting,  excluding  shares  owned  by the  interested  stockholder.


                                       51
<PAGE>

Except as otherwise  specified in Section 203, an  "interested  stockholder"  is
defined as:

     o any  person  that is the owner of 15% or more of the  outstanding  voting
       stock of the corporation;

     o any person that is an affiliate or associate of the  corporation  and was
       the  owner  of 15%  or  more  of  the  outstanding  voting  stock  of the
       corporation at any time within the three-year period immediately prior to
       the date on which it is sought to be determined whether such person is an
       interested stockholder; or

     o the affiliates and associates of any such person.

     During the course of reviewing  this proxy  statement,  the  Securities and
Exchange  Commission raised the issue of the applicability of Section 203 to the
merger.  In particular,  the Staff inquired  whether John K. Carlyle,  Daniel J.
Thomas,  Richard D. Rehm,  M.D. and Robert A.  Ortenzio (the  "Directors")  were
"affiliates" or "associates" of WCAS under Section 203 and, as a result, whether
their  ownership  of  Concentra  common  stock  should  be  aggregated  with the
Concentra  common  stock owned by WCAS for the purposes of  determining  whether
WCAS is an "interested  stockholder"  under Section 203. WCAS owns approximately
14.97% of Concentra's  common stock for purposes of Section 203.  Aggregation of
the Directors  holdings with WCAS' holdings would cause WCAS to be an interested
stockholder  under Section 203. See "Principal  Stockholders and Stock Ownership
of Management and Others."

     Concentra  does not believe  that any Director is an associate or affiliate
of WCAS or that WCAS is an interested  stockholder  for purposes of Section 203.
See "Special  Factors - Interests of Certain  Persons in the Merger."  Prickett,
Jones,  Elliott & Kristol,  special Delaware  counsel to Concentra,  and Morris,
Nichols, Arsht & Tunnell,  special Delaware counsel to WCAS, have both delivered
opinions that the Directors are not  associates or affiliates of WCAS,  and that
WCAS is not an interested stockholder of Concentra, for purposes of Section 203.
However, Prickett, Jones, Elliott & Kristol and Morris, Nichols, Arsht & Tunnell
have  informed  Concentra  and Yankee,  respectively,  that there is no case law
having  binding  precedential  effect  relating  to this matter and that a final
determination of this matter would be made by a court of competent jurisdiction.

     In addition,  on June 29, 1999, WCAS  determined that it had  inadvertently
exceeded the 15% ownership  threshold  for  determining  interested  stockholder
status for purposes of Section 203. Section  203(b)(5) permits a stockholder who
becomes an  interested  stockholder  inadvertently  to, as soon as  practicable,
divest itself of ownership of sufficient  shares so that the stockholder  ceases
to be an interested stockholder if the stockholder would not, at any time within
the three year period immediately prior to the business  combination,  have been
an interested  stockholder  but for the  inadvertent  acquisition  of ownership.
Promptly  following its discovery that it had exceeded the 15%  threshold,  WCAS
divested itself of that number of shares of Concentra common stock to reduce its
ownership to 14.97% for purposes of Section 203. See  "Purchases of Common Stock
by Certain Persons."  Prickett,  Jones,  Elliott & Kristol and
Morris,   Nichols,   Arsht  &  Tunnell  have  informed   Concentra  and  Yankee,
respectively,  that the divestiture  provisions of Section  203(b)(5) applied to
WCAS and have opined that the  restrictions on business  combinations in Section
203 do not apply to the merger. However,  Prickett, Jones, Elliott & Kristol and


                                       52
<PAGE>

Morris,   Nichols,   Arsht  &  Tunnell  have  informed   Concentra  and  Yankee,
respectively,  that  there is no case law  having  binding  precedential  effect
relating to Section 203 (b)(5) and that a final  determination  of whether  WCAS
inadvertently  became  an  "interested  person"  would  be made  by a  court  of
competent jurisdiction.

VOTING AND REVOCATION OF PROXIES

     You may revoke your proxy at any time before it is  exercised by (i) filing
with the  Secretary of Concentra an  instrument  revoking it, (ii)  submitting a
properly  executed  proxy  bearing a later date or (iii) voting in person at the
special meeting. In addition, proxies voted through the Internet or by telephone
may be revoked by voting your proxy  through the Internet or by telephone in the
same manner as your original vote as indicated on the form of Concentra's proxy,
sent to you with this proxy statement.  After___________________, you will not
be able to revoke your proxy  through the Internet or by  telephone.  Subject to
such  revocation,  all of your shares  represented by a properly  executed proxy
received by the  Secretary of Concentra  will be voted in  accordance  with your
instructions, and if no instructions are indicated, will be voted to approve and
adopt  the  merger  agreement  and in such  manner as the  persons  named on the
enclosed  proxy card in their  discretion  determine upon such other business as
may properly come before the special  meeting or any adjournment or postponement
of the special meeting.

     Your  shares  will be voted by proxy at the  special  meeting if your proxy
card is properly signed,  dated and received by the Secretary of Concentra or if
you vote your proxy  through the  Internet or by  telephone  as indicated on the
form of Concentra's  proxy attached hereto as Appendix 99.1 prior to the special
meeting.

EFFECTIVE TIME OF THE MERGER AND PAYMENT FOR SHARES

     The effective time of the merger will be the date and time of filing of the
certificate of merger with the Secretary of State of the State of Delaware. This
is currently expected to occur as soon as practicable after the special meeting,
subject to approval and adoption of the merger  agreement at the special meeting
and  satisfaction  or waiver of the other  terms and  conditions  of the  merger
agreement.  Detailed  instructions  with regard to the  surrender  of  Concentra
common  stock  certificates,  together  with a letter  of  transmittal,  will be
forwarded  to  you  by  Concentra's  exchange  agent,   ChaseMellon  Shareholder
Services,  L.L.C., promptly after the effective time. You should not submit your
certificates to the exchange agent until you have received these materials.  The
exchange agent will send you payment of the merger  consideration as promptly as
practicable  following  receipt by the exchange agent of your  certificates  and
other  required  documents.  No  interest  will be paid or  accrued  on the cash
payable upon the surrender of certificates. You should not send any certificates
at this time.

OTHER MATTERS TO BE CONSIDERED

The Board is not aware of any other  matter  that  will be  brought  before  the
special meeting.  If, however,  other matters are presented,  your proxy will be
voted in the discretion of the


                                       53
<PAGE>

holder of your proxy.

                                   THE MERGER

GENERAL DESCRIPTION

     At the  effective  time of the merger,  Yankee will be merged with and into
Concentra.  Concentra will be the surviving  corporation and will continue under
the name  "Concentra  Managed  Care,  Inc." As a result of the merger,  you will
receive $16.50 in cash,  without  interest,  for each share of Concentra  common
stock  that  you  own  unless  you  are  entitled  to and  have  perfected  your
dissenters'  appraisal rights. Shares held by Concentra,  its subsidiaries,  and
Yankee or its  affiliates  will be  canceled in the merger.  In  addition,  each
outstanding and  unexercised  vested option to purchase  Concentra  common stock
will be  converted  into  the  right to  receive  cash  for the  difference,  if
positive, between $16.50 a share and the exercise price of the option.

CERTAIN TERMS OF THE MERGER AGREEMENT

     The following  description of the merger  agreement  describes the material
terms of the merger agreement. The full text of the merger agreement is attached
to this proxy statement as Appendix A and is  incorporated  herein by reference.
Concentra encourages you to read the entire merger agreement.

     Effective  Time of the  Merger.  The  merger  agreement  provides  that the
closing  of the  merger  will  take  place  as soon  as  practicable  after  the
satisfaction  or  waiver  of the  conditions  to  the  merger.  At the  closing,
Concentra will file the necessary  documents  with public  officials to complete
the merger.  Concentra  expects that, if all  conditions to the merger have been
satisfied or waived,  the  effective  time will occur on the date of the special
meeting or as soon thereafter as practicable.

     General.  The merger  agreement  provides that,  subject to satisfaction of
certain  conditions,  Yankee  will be merged with and into  Concentra,  and that
following the merger,  the separate existence of Yankee will cease and Concentra
will continue as the surviving  corporation.  At the effective time, and subject
to the terms and conditions set forth in the merger agreement:

     o the  stockholders  of  Concentra  will  receive  $16.50 in cash,  without
       interest,  for each share of Concentra  common stock that they own, other
       than shares held by  stockholders  who are entitled to and have perfected
       their  dissenters'  appraisal  rights.  Shares  held  by  Concentra,  its
       subsidiaries,  and  Yankee  or its  affiliates  will be  canceled  in the
       merger, and

     o each outstanding  share of common stock of Yankee shall be converted into
       one share of common stock of the same class of the surviving corporation.
       As a result of the merger,  the Concentra  common stock will no longer be
       publicly traded.

                                       54
<PAGE>

     Surrender And Exchange Of Stock Certificates.  As soon as practicable after
the effective time of the merger,  the surviving  corporation  will deposit with
ChaseMellon Shareholder Services,  L.L.C., the exchange agent, an amount of cash
equal to the aggregate  amount of merger  consideration to be paid to holders of
Concentra  common stock. The exchange agent will as promptly as practicable send
payment of the merger consideration in exchange for surrendered Concentra common
stock certificates.

     Promptly  after the effective  time of the merger,  the exchange agent will
send to  each  holder  of  Concentra  common  stock  certificates  a  letter  of
transmittal  containing  instructions  for use in effecting the exchange of such
holder's  Concentra  common  stock  certificates  for the  merger  consideration
payable to such holder.  Upon  surrender to the exchange agent of an outstanding
certificate  or  certificates  which  represented  Concentra  common  stock  and
acceptance of such  certificate by the exchange  agent,  the exchange agent will
deliver to the  holder of such  certificate  the amount of merger  consideration
owed to the holder pursuant to the merger agreement. No interest will be paid or
accrue on any cash payable to any holder of Concentra common stock certificates.

     Any  portion of the merger  consideration  payable to holders of  Concentra
common stock  certificates  which remains  undistributed  for 183 days after the
effective  time shall be delivered to the surviving  corporation.  Any holder of
Concentra  common  stock  certificates  who has  not  previously  exchanged  his
certificates may thereafter only look to the surviving corporation and only as a
general creditor thereof for payment of that portion of the merger consideration
owed to such holder pursuant to the merger agreement.

     If you do not have your Concentra common stock certificate, you may make an
affidavit of that fact. In addition,  the surviving corporation may require that
you post a bond in a reasonable amount  determined by the surviving  corporation
with respect to the missing stock certificate. Upon receipt of the affidavit and
any  required  bond,  the  exchange  agent will  issue the merger  consideration
payable to you in exchange for your Concentra common stock certificate.

     Stock Plan.  Concentra has agreed to use its reasonable best efforts (which
shall  include,  without  limitation,  attempting  to obtain  the  consents,  if
required,  of holders  of  Concentra  options)  to effect  the  cancellation  or
amendment at the effective time of all outstanding  options to acquire Concentra
common stock in exchange  for a cash payment  equal to, in the case of each such
canceled Concentra option, the merger  consideration  payable to such holder had
he  exercised  such option  less the  exercise  price per share of such  option.
Concentra  has also  agreed to use its  reasonable  best  efforts  (which  shall
include, without limitation,  attempting to obtain the consents, if required, of
holders  of shares of  Concentra  common  stock  which are  restricted  stock of
Concentra)  to effect the  cancellation  or  amendment of all  restricted  stock
grants in exchange  for a cash  payment  equal to the merger  consideration  per
share  to be paid at the  time  such  restrictions  would  otherwise  lapse.  In
addition, Concentra's current employee stock purchase plan will be terminated at
the effective time of the merger.

                                       55
<PAGE>

     Financing.  Yankee has provided a binding commitment,  in the form of a bid
letter from WCAS to  Concentra  dated  February 26, 1999 (the "Equity and Bridge
Commitment"),  and has received binding written commitments,  dated February 26,
1999,  addressed to WCAS, from Chase  Securities Inc., The Chase Manhattan Bank,
DLJ Capital  Funding,  Inc.,  Credit Suisse First Boston and Fleet National Bank
(the "Debt  Commitments"),  and "highly  confident"  letters dated  February 24,
1999,  from  Donaldson,  Lufkin &  Jenrette  Securities  Corporation  and  Chase
Securities,  Inc. (the "Highly Confident  Letters").  Chase Capital Partners and
WCAS have provided commitment letters dated February 24, 1999 and March 1, 1999,
respectively,  to purchase from  Concentra  senior  unsecured  discount notes of
Concentra (the "Senior Discount Investment Letters"). WCAS Capital Partners III,
L.P. has provided a binding  commitment to provide certain bridge financing,  in
the form of a commitment  letter dated February 26, 1999, from WCAS to Concentra
(the "Bridge  Commitment").  Ferrer  Freeman  Thompson & Co., LLC has executed a
subscription  agreement with Yankee,  on behalf of Health Care Capital  Partners
L.P. and Health Care  Executive  Partners,  L.P.,  pursuant to which Health Care
Capital  Partners L.P. has agreed to contribute to the equity  capital of Yankee
(together  with the Equity  and Bridge  Commitment,  the Debt  Commitments,  the
Highly Confident Letters,  the Senior Discount Investment Letters and the Bridge
Commitment, the "Financing Commitments").

     Contribution  Obligation.  Yankee has received the undertaking of WCAS, its
sole stockholder,  obligating WCAS to contribute to the equity capital of Yankee
pursuant to the terms of a letter agreement delivered to Concentra  concurrently
with Yankee's execution and delivery of the merger agreement.

     Rights Agreement Amendment.  Concentra has entered into an amendment to the
Rights  Agreement  dated  September 29, 1997 between  Concentra and  ChaseMellon
Shareholder Services,  L.L.C. pursuant to which (i) the rights agreement and the
rights will not be  applicable  to the merger,  (ii) the execution of the merger
agreement and the consummation of the merger shall not result in a "Distribution
Date" under the rights  agreement,  (iii)  consummation  of the merger shall not
result in WCAS,  Yankee or their affiliates being an "Acquiring  Person," result
in the occurrence of an event described in Section 14 of the rights agreement or
otherwise  result in the ability of any person to exercise any  material  rights
under the rights  agreement or to require the rights to separate from the shares
of  Concentra  common  stock to  which  they are  attached  and (iv) the  rights
agreement will expire immediately prior to the effective time of the merger.

     Representations  And Warranties.  The merger agreement  contains  customary
representations  and warranties of Concentra  relating to various aspects of its
business and  financial  statements  and other  matters,  including  among other
things:

     o its organization, standing and power,

     o its capital structure,

     o its subsidiaries,

                                       56
<PAGE>

     o its  authority to enter into and the validity  and  effectiveness  of the
       merger agreement,

     o the absence of conflicts, violations or defaults under its certificate of
       incorporation, bylaws and certain other agreements,

     o the absence of required  consents and  approvals of certain  governmental
       entities relating to the merger,

     o the  documents  and  reports  filed  with  the  Securities  and  Exchange
       Commission  (the  "SEC")  and  the  accuracy  and   completeness  of  the
       information contained therein,

     o this proxy statement and the accuracy and completeness of the information
       contained herein,

     o the absence of defaults under material contracts,

     o compliance  with  applicable  laws,

     o litigation,

     o taxes,

     o pension  and benefit  plans and other  matters  relating to the  Employee
       Retirement Income Security Act of 1974,

     o the stockholder  vote required to consummate the merger,

     o environmental matters,

     o intellectual property,

     o labor matters,

     o material contracts,

     o transactions with affiliates, and

     o the amendment of the rights agreement.

     The merger agreement also contains customary representations and warranties
of Yankee  relating to various  aspects of its business,  including  among other
things:

     o its organization, standing and power,

                                       57
<PAGE>

     o its capital structure,

     o its  subsidiaries,  o its  authority  to enter into and the  validity and
       effectiveness of the merger agreement,

     o the absence of conflicts, violations or defaults under its certificate of
       incorporation, bylaws and certain other agreements,

     o the absence of required  consents and  approvals of certain  governmental
       entities relating to the merger,

     o the  documents  and  reports  filed  with  the SEC and the  accuracy  and
       completeness of the information contained therein,

     o this proxy statement and the accuracy and completeness of the information
       contained herein,

     o the merger will not result in a fraudulent conveyance,

     o the interim operations of Yankee,

     o financing,

     o litigation,

     o its and its affiliates'  ownership of shares of Concentra common stock, o
       its  solvency,  and

     o its receipt of an  undertaking  from its sole  stockholder  to contribute
       equity  capital.

The  representations  and  warranties  expire  at  the
       effective  time of the merger.

     Conduct Of Business Prior To The Merger. Concentra has agreed that prior to
the merger it will operate its business in the ordinary  course  consistent with
past  practices  and will use all  reasonable  efforts  to  preserve  intact its
business  organizations,  goodwill and  relationships  with third parties and to
retain the services of its current  officers and key  employees and preserve its
relationships with customers and suppliers.

     In addition, the  merger  agreement  places  specific  restrictions  on the
ability of Concentra and its subsidiaries to:

                                       58
<PAGE>

     o declare, set aside or pay any dividends on or make other distributions in
       respect of any of its capital  stock (except for cash  dividends  paid to
       Concentra and its  wholly-owned  subsidiaries  with regard to Concentra's
       subsidiaries' capital stock), or set aside funds therefor;

     o adjust,  split, combine or reclassify any of its capital stock, or issue,
       authorize or propose the issuance of any other  securities in respect of,
       in lieu of or in substitution for, shares of its capital stock;

     o repurchase,  redeem or otherwise acquire any shares of its capital stock,
       except as  required  by the terms of its  securities  outstanding  or any
       employee  benefit plan in effect as of the date of the merger  agreement,
       or set aside funds therefor;

     o other than in accordance with the rights agreement:

        o grant any  options,  warrants or other  rights to  purchase  shares of
          capital stock;

        o except as  permitted  by the merger  agreement,  amend the terms of or
          reprice  any  Concentra   stock  option  or  restricted   stock  grant
          outstanding on the date of the merger  agreement or amend the terms of
          any current Concentra stock option plan; or

        o issue,  deliver,  pledge, sell or otherwise encumber any shares of its
          capital  stock,  any  Concentra  debt or any  subsidiary  debt, or any
          securities  convertible  into,  or any rights,  warrants or options to
          acquire,  any such shares,  Concentra  debt or  subsidiary  debt (this
          restriction  does not apply to shares  issuable  pursuant to Concentra
          stock options outstanding on the date of the merger agreement,  shares
          issuable upon  conversion of Concentra's  6% Convertible  Subordinated
          Notes due 2001 and 4.5%  Convertible  Subordinated  Notes due 2003 and
          issuances of capital stock of Concentra's subsidiaries to Concentra or
          to a wholly-owned subsidiary of Concentra);

     o amend or propose to amend its certificate of  incorporation or bylaws (or
       other organizational documents);

     o merge or  consolidate  with,  or  acquire  any  equity  interest  in, any
       corporation,  partnership, association or other business organization, or
       enter into an agreement with respect thereto, except for:

        o a  merger  of a  wholly-owned  subsidiary  with or into  Concentra  or
          another  wholly-owned  subsidiary  of  Concentra,

        o the creation of a  wholly-owned  subsidiary in the ordinary  course of
          business, or

        o investments  in joint  ventures  not in  excess of  $5,000,000  in the
          aggregate;


                                       59
<PAGE>

     o acquire or agree to  acquire  any  material  assets,  except for  certain
       acquisitions described in the merger agreement and acquisitions involving
       the payment of consideration by Concentra not in excess of $10,000,000 in
       the aggregate or as otherwise described in the merger agreement;

     o make any loan or advance to, or any other  investment  in, any persons in
       excess of  $5,000,000  in the  aggregate,  other  than with  respect to a
       wholly-owned  subsidiary of Concentra  existing on the date of the merger
       agreement;

     o sell, lease,  encumber or otherwise dispose of any of its material assets
       other than sales or leases in the ordinary course of business  consistent
       with  past  practice  or  agree  to such  an  arrangement;  o  authorize,
       recommend,  propose or announce an  intention to adopt a plan of complete
       or  partial  liquidation  or  dissolution  (other  than  by  wholly-owned
       subsidiaries acquired by Concentra);

     o except for increases in the compensation of employees of Concentra or its
       subsidiaries  (other than  directors or executive  officers)  made in the
       ordinary course of business and consistent with past practice,  or as may
       be required by applicable law or pursuant to any of the employee  benefit
       plans existing on the date of the merger agreement:

        o enter into any new,  or  materially  amend any  existing,  employment,
          severance or termination  agreement with any director,  officer or key
          employee, or

        o become obligated under any new employee benefit plan, which was not in
          existence on the date the merger agreement, or amend any such existing
          plan or  arrangement  if such  amendment  would  have  the  effect  of
          materially enhancing any benefits thereunder;

     o assume or incur any  indebtedness  for borrowed  money  (except for lease
       obligations  incurred in the ordinary  course of business and  consistent
       with past  practice or  drawdowns  under its  existing  revolving  credit
       facility, if any, made in the ordinary course of business consistent with
       past practice);

     o issue or sell any debt  securities  or  warrants or rights to acquire any
       debt securities;

     o guarantee any debt obligations of any other person (except obligations of
       wholly-owned subsidiaries of Concentra);

     o make any material changes with respect to accounting policies, procedures
       and  practices  other  than as  required  by the SEC,  applicable  law or
       generally accepted accounting principles;


                                       60
<PAGE>

     o settle or  compromise  any claims or  litigation  involving  payments  by
       Concentra or any of its  subsidiaries of more than $500,000 in any single
       instance  or  related  instances,  or  that  otherwise  are  material  to
       Concentra and its subsidiaries, taken as a whole;

     o make any tax election,  or take any tax position,  except in the ordinary
       and usual course of business consistent with past practices;

     o enter into any license with respect to any  intellectual  property unless
       such license is  non-exclusive  and entered  into in the ordinary  course
       consistent with past practice or in accordance with existing contracts or
       other agreements;

     o fail to use reasonable  business efforts to keep in full force and effect
       insurance  comparable  in amount and scope of coverage to  insurance  now
       carried by it; or

     o agree to or make any  commitment  to take any actions  prohibited  by the
       merger agreement.

     No Solicitation. In the merger agreement, Concentra has agreed that:

     o it will  not,  and will not  authorize  or  permit  any of its  officers,
       directors,  employees,  agents,  affiliates and other  representatives or
       those of any of its  subsidiaries  to,  initiate,  encourage  or  solicit
       (including by way of providing  information) any prospective  acquiror or
       the invitation or submission of any inquiries, proposals or offers or any
       other efforts or attempts that constitute,  or may reasonably be expected
       to lead to, any Acquisition  Proposal (as herein defined) from any person
       or engage in any negotiations with respect thereto or otherwise cooperate
       with or assist or participate in, or facilitate any such proposal;

     o it will  immediately  cease  and  cause  to be  terminated  any  existing
       solicitation,   initiation,   encouragement,   activity,   discussion  or
       negotiation  with any  other  parties  prior  to the  date of the  merger
       agreement; and

     o it will promptly (and in any event within 24 hours) communicate to Yankee
       the terms and conditions of any Acquisition  Proposal that it may receive
       and will keep Yankee informed, as promptly as reasonably practicable,  as
       to the status of any actions,  including any discussions,  taken pursuant
       to such  Acquisition  Proposal.

     However, the merger agreement does not prohibit:

     o Concentra's  Board from  taking and  disclosing  to the  stockholders  of
       Concentra a position contemplated by Rules 14d-9 and 14e-2(a) promulgated
       under the Securities Exchange Act of 1934; or

     o following   receipt  from  a  third  party,   without  any  solicitation,
       encouragement or initiation,  directly or indirectly, by Concentra or any
       representative of Concentra, of a bona


                                       61
<PAGE>

       fide Acquisition Proposal:

        o Concentra from engaging in discussions or negotiations with such third
          party and furnishing  such third party  information  concerning it and
          its  business,  properties  and assets if such third party  executes a
          confidentiality agreement in reasonably customary form; or

        o the Board  from  withdrawing,  modifying,  refusing  to  recommend  or
          terminating  the merger  agreement in accordance with the terms of the
          merger  agreement but only to the extent that the Board shall conclude
          in good faith based on the advice of outside  counsel that such action
          is  necessary  in  order  for the  Board  to act in a  manner  that is
          consistent with its fiduciary duties under applicable law.

     The term "Acquisition Proposal" means:

     o any inquiry,  proposal or offer from any person relating to any direct or
       indirect acquisition or purchase of a business that constitutes one-third
       or more of the net  revenues,  net income or assets of Concentra  and its
       subsidiaries,  taken as a whole,  or one-third or more of the outstanding
       Concentra common stock;

     o any tender offer or exchange  offer that if  consummated  would result in
       any  person  beneficially  owning  one-third  or more of the  outstanding
       Concentra common stock; or

     o any  merger,  consolidation,   business  combination,   recapitalization,
       liquidation,  dissolution or similar transaction  involving Concentra (or
       any subsidiary or subsidiaries  whose business  constitutes  one-third or
       more of the net  revenues,  net  income or assets  of  Concentra  and its
       subsidiaries taken as a whole).

     Conditions Precedent.  The respective obligations of each party to complete
the merger are subject to the satisfaction or waiver, where permissible, by each
party prior to the effective time of the following conditions:

     o adoption of the merger  agreement by the affirmative  vote of the holders
       of a  majority  of the  outstanding  shares  of  Concentra  common  stock
       entitled to vote thereon;  provided that Yankee will,  and will cause its
       affiliates to, vote all shares of Concentra  common stock owned by Yankee
       or any  of  its  affiliates  in  favor  of  the  adoption  of the  merger
       agreement;

     o termination  or  expiration  of the  applicable  waiting  period (and any
       extension thereof) under the HSR Act;

     o no  restrictive  order or other  requirement  will  have  been  placed on
       Concentra,  Yankee or the surviving  corporation  in connection  with any
       regulatory approval;

     o no temporary  restraining order,  preliminary or permanent  injunction or
       other order issued by any court of competent  jurisdiction or other legal
       restraint or prohibition  pre-


                                       62
<PAGE>

       venting the  consummation  of the  merger  will be in  effect;  and

     o no statute,  rule,  order,  decree or regulation  will have been enacted,
       promulgated  or  otherwise  issued  by  any  governmental   entity  which
       prohibits the consummation of the merger.

     The  obligation  of Yankee to effect the  merger is further  subject to the
following conditions:

     o Concentra will have performed the obligations required to be performed by
       it under the merger  agreement  at or prior to the  closing  date and the
       representations  and  warranties  of  Concentra  set forth in the  merger
       agreement  will be true and correct in all  material  respects  (provided
       that any representation or warranty of Concentra  contained in the merger
       agreement  that is subject to a materiality,  Material  Adverse Effect or
       similar   qualification  shall  not  be  so  qualified  for  purposes  of
       determining the existence of any breach thereof on the part of Concentra)
       both as of the date of the merger agreement and as of the closing date of
       the merger and Yankee will have received a  certificate  signed on behalf
       of  Concentra  by the chief  executive  officer  and the chief  financial
       officer of Concentra to such effect; and

     o Yankee will have obtained the  financing  required to complete the merger
       substantially on the terms  contemplated by the Financing  Commitments or
       alternative  financing on terms no less favorable in any material respect
       than those set forth in the Financing Commitments,  unless the failure to
       obtain the financing was the result of a failure by Yankee to perform any
       covenant  or  condition  contained  therein  or  the  inaccuracy  of  any
       representation or warranty of Yankee.

     The obligation of Concentra to effect the merger is further  subject to the
following conditions:

     o Yankee will have performed the obligations required to be performed by it
       under  the  merger  agreement  at or  prior to the  closing  date and the
       representations  and  warranties  of  Yankee  set  forth  in  the  merger
       agreement  will be true and correct in all  material  respects  (provided
       that any  representation  or warranty of Yankee,  contained in the merger
       agreement  that is subject to a materiality,  Material  Adverse Effect or
       similar   qualification   will  not  be  so  qualified  for  purposes  of
       determining  the  existence of any breach  thereof on the part of Yankee)
       both as of the date of the merger agreement and as of the closing date of
       the merger and  Concentra  will have  received  a  certificate  signed on
       behalf of Yankee by the president of Yankee to such effect;

     o Yankee will have caused a valuation firm to have delivered to Concentra a
       solvency letter  addressed to the Board in form and substance  reasonably
       acceptable to Concentra as to the solvency of the  surviving  corporation
       after  giving  effect  to  the  merger  and  the  financing  arrangements
       contemplated by Yankee with respect to the merger; and

     o Yankee  will  have  obtained  the  financing  substantially  on the terms
       contemplated by the

                                       63
<PAGE>

       Financing Commitments or alternative financing on terms noless favorable
       in  any  material   respect  than  those  set  forth  in  the   Financing
       Commitments.

     Termination.  The merger  agreement may be terminated and the merger may be
abandoned at any time prior to the effective time as follows:

     o by mutual written consent of Concentra and Yankee;

     o by either Yankee or Concentra if any court of competent  jurisdiction  in
       the United States or other governmental  entity shall have issued a final
       and  non-appealable  order,  decree or ruling,  or taken any other action
       restraining, enjoining or otherwise prohibiting the merger;

     o by either Yankee or Concentra if the  effective  time has not occurred on
       or before  August  31,  1999,  but this  right to  terminate  the  merger
       agreement  will  not  be  available  to any  party  whose  breach  of any
       obligation  under the merger  agreement has been the cause of or resulted
       in the failure of the effective time to occur on or before such date;

     o by Yankee,  if any of the  representations  and  warranties  of Concentra
       contained  in the  merger  agreement  fail to be true and  correct in any
       material  respect  when  made or have  since  become,  and at the time of
       termination remain,  untrue or incorrect in any material respect and such
       failure or breach shall continue  unremedied for ten days after Concentra
       has received written notice from Yankee of the occurrence of such failure
       or breach  (provided  that in no event shall such ten-day  period  extend
       beyond August 31, 1999);

     o by Yankee,  if Concentra  shall have  breached or failed to comply in any
       material  respect with any of its obligations  under the merger agreement
       (other  than as a result of a breach by Yankee of any of its  obligations
       under the merger  agreement)  and such failure or breach  shall  continue
       unremedied for ten days after Concentra has received  written notice from
       Yankee of the  occurrence of such failure or breach  (provided that in no
       event shall such ten-day period extend beyond August 31, 1999);

     o by Yankee, if the Board has withdrawn or modified, in any manner which is
       materially  adverse to Yankee,  its  recommendation  or  approval  of the
       merger  agreement  and  the  merger;  o  by  Concentra,  if  any  of  the
       representations   and  warranties  of  Yankee  contained  in  the  merger
       agreement shall fail to be true and correct in any material  respect when
       made or have since become, and at the time of termination remain,  untrue
       or  incorrect  in any  material  respect and such failure or breach shall
       continue unremedied for ten days after Yankee has received written notice
       from Concentra of the occurrence of such failure or breach (provided that
       in no event shall such ten-day period extend beyond August 31, 1999);

                                       64
<PAGE>

     o by  Concentra,  if Yankee shall have  breached or failed to comply in any
       material  respect with any of its obligations  under the merger agreement
       (other  than  as a  result  of a  breach  by  Concentra  of  any  of  its
       obligations  under the merger agreement) and such failure or breach shall
       continue unremedied for ten days after Yankee has received written notice
       from Concentra of the occurrence of such failure or breach (provided that
       in no event shall such ten-day  period extend beyond August 31, 1999);

     o by Concentra,  if the Board  determines in the exercise of its good faith
       judgment as to fiduciary  duties to Concentra's  stockholders  imposed by
       law, as advised by outside counsel,  that such termination is required by
       reason of an  Acquisition  Proposal  being made.  Concentra  shall notify
       Yankee  promptly of its  intention to terminate  the merger  agreement or
       enter  into a  definitive  agreement  with  respect  to  any  Acquisition
       Proposal;  and provided that  Concentra  may not effect such  termination
       unless Concentra has  contemporaneously  with such  termination  tendered
       payment  to  Yankee,  or  its  designees,  of  the  applicable  Concentra
       termination fee (discussed below); or

     o by  Yankee or  Concentra,  if  Concentra  fails to  obtain  the  required
       Concentra  stockholder  approval  at  the  stockholder  meeting  (or  any
       adjournment thereof).

     Termination Fees And Expenses. The merger agreement provides that except as
described  below and except  with  respect to claims for  damages  incurred as a
result of a material  breach of the  merger  agreement,  all costs and  expenses
incurred  in  connection  with the  merger  agreement  will be paid by the party
incurring such expense.  Concentra will pay all costs and expenses in connection
with the printing and mailing of this proxy statement, as well as all SEC filing
fees related to the transactions contemplated by the merger agreement.

     Concentra will pay Yankee a  termination  fee equal to $25.0 million in the
aggregate  and will  reimburse  Yankee for its  out-of-pocket  expenses up to an
aggregate  amount equal to $4.0 million,  so that the total possible fee paid by
Concentra in connection  with the  termination of the merger  agreement is $29.0
million, if:

     o the  merger  agreement  is  terminated  by  Yankee  because  the Board of
       Concentra  has  withdrawn  or  modified,  in any way which is  materially
       adverse to Yankee, its recommendation or approval of the merger agreement
       and the merger;

     o the merger  agreement is terminated by Concentra  because in the exercise
       of its good faith judgment as to its fiduciary duties to its stockholders
       imposed by law,  as advised by outside  counsel,  the Board of  Concentra
       determines that such  termination is required by reason of an Acquisition
       Proposal being made; or

     o the merger  agreement is  terminated by Yankee after  Concentra  fails to
       obtain the required  stockholder approval required to complete the merger
       and,  within 275 days after such  termination,  Concentra  enters  into a
       definitive  agreement  with  respect  to a  transaction  proposed  in  an
       Acquisition Proposal that was submitted to Concentra prior

                                       65
<PAGE>

       to Concentra's stockholder  meeting  and   Concentra   consummates   such
       transaction within 462 days after such termination.

     If  Yankee  is in  material  breach of its  obligations  under  the  merger
agreement,  Concentra  will not be obligated to pay Yankee a termination  fee or
reimburse  Yankee for its expenses.  Concentra has agreed to pay any termination
fee owed by it to Yankee on the date of the termination of the merger  agreement
or, in the case of a fee owed due to consummation of another transaction, on the
date such  transaction is consummated.  Any  reimbursement  for expenses owed to
Yankee by Concentra will be paid when the  termination fee is paid provided that
documentation of such expenses has been received by Concentra.

     INDEMNIFICATION.  The merger  agreement  provides that, for a period of six
years after the effective  time,  the surviving  corporation  will indemnify the
present and former  officers,  directors,  employees and agents of Concentra and
its subsidiaries  from liabilities  arising out of actions or omissions in their
capacity as such prior to or at the  effective  time of the merger,  to the full
extent  permitted  under  Delaware  law or as  provided  in  Concentra's  or its
subsidiaries'   organizational   documents   or  any   written   indemnification
agreements.  In addition,  the  surviving  entity will maintain  directors'  and
officers'  insurance coverage for six years after the effective time on terms no
less favorable to such indemnified parties than existing insurance coverage, but
the  surviving  corporation  will not be  required  to pay an annual  premium in
excess  of 200%  of the  last  premium  paid  prior  to the  date of the  merger
agreement.

     AMENDMENT.  The merger agreement may be amended,  modified or supplemented,
only by  written  agreement  of Yankee  and  Concentra  at any time prior to the
effective time. However,  after the required Concentra  stockholder approval, no
term or condition contained in the merger agreement shall be amended or modified
in any manner  that by law  requires  further  approval by the  stockholders  of
Concentra without so obtaining such further stockholder approval.

ANTICIPATED ACCOUNTING TREATMENT

     The merger will be accounted for as a  recapitalization  for accounting and
financial reporting purposes.  Accordingly,  the historical basis of Concentra's
assets  and  liabilities  will  not  be  affected  by  the  merger.   After  the
recapitalization,  Ferrer  Freeman  will  own  an  approximate  7%  interest  in
Concentra.  This interest will be held in a separate  class of common stock that
is identical to the original  common stock of Concentra  except it will have the
ability  to elect a member  of the Board of  Concentra.  Ferrer  Freeman  has no
formal or informal rights to approve or veto transactions. The rights granted to
Ferrer Freeman are  protective  rights rather than  participating  rights and as
such  Ferrer  Freeman  and  WCAS  should  not  be  construed  as  members  of  a
collaborative group.

GOVERNMENTAL APPROVALS

     Transactions  such as the merger are subject to review by the Department of
Justice and the Federal Trade  Commission to determine  whether they comply with
applicable  antitrust laws.

                                       66
<PAGE>

Under the  provisions  of the HSR Act, the merger may not be  consummated  until
such time as the specified waiting period  requirements of the HSR Act have been
satisfied.  Concentra filed a notification  report,  together with a request for
early termination of the waiting period,  with the Department of Justice and the
Federal Trade  Commission  under the HSR Act on April 22, 1999.  The request for
early  termination  of the  waiting  period  was  granted by the  Federal  Trade
Commission on May 5, 1999.

LITIGATION RELATING TO THE MERGER

     As of the  date of this  proxy  statement,  Concentra  is  aware  of  three
lawsuits that have been filed by alleged  stockholders of Concentra  relating to
the merger.  All three  lawsuits were filed in the Chancery Court for New Castle
County, Delaware. Each of the lawsuits names Concentra, its directors and Yankee
as  defendants.  The  plaintiff in each  lawsuit  seeks to represent a purported
class of all public holders of Concentra common stock.

     The lawsuits  allege,  among other things,  that the directors of Concentra
breached their  fiduciary  duties to Concentra's  stockholders  by approving the
merger. Specifically, the directors are alleged to have breached their fiduciary
duties of care and  loyalty  by  failing  to  conduct  an  impartial  auction to
determine the maximum value  attainable  for the common stock of Concentra.  The
complaints allege that certain  relationships  between WCAS and Concentra caused
Concentra's  directors to favor WCAS  throughout  the sale of  Concentra  and to
enter  into a merger  agreement  that had the  effect  of  capping  the price of
Concentra's  stock.  The lawsuits  seek,  among other  things,  preliminary  and
permanent injunctive relief prohibiting consummation of the merger,  unspecified
damages, attorneys' fees and other relief.

     Concentra  has reached an agreement in principle to settle all  outstanding
class action litigation filed in connection with the merger.  Under the terms of
the  settlement,  Concentra  agreed to make  certain  amendments  to this  proxy
statement. In return, Concentra, WCAS and their respective affiliates, officers,
directors  and other  representatives  will be  released  from all claims of the
class.  The  settlement  is  conditioned  upon the  closing of the  merger,  the
execution of definitive settlement documents and court approval. Under the terms
of the  proposed  settlement,  the  defendants  agreed to pay up to  $325,000 in
court-awarded attorneys' fees and expenses.

ESTIMATED FEES AND EXPENSES OF THE MERGER

         Estimated fees and expenses of the merger incurred or to be incurred by
Concentra are approximately as follows:

Legal and accounting fees and other
  transaction expenses ........................... $  2,700,000
Hart-Scott-Rodino filing fee .....................       45,000
Exchange Agent fees and expenses .................       25,000
Proxy solicitation fees and expenses .............       10,000
Securities and Exchange Commission filing fee ....      158,501
Printing and mailing costs .......................       50,000


                                       67
<PAGE>

Miscellaneous expenses ...........................       50,000
Financial advisory fees ..........................   13,800,000
Underwriting of Senior Credit Facility ...........   11,500,000
Senior Subordinated Underwriting .................    5,200,000
Welsh Carson's fee ...............................   10,500,000


                       RIGHTS OF DISSENTING STOCKHOLDERS

     You are  entitled to  appraisal  rights  under  Section 262 of the Delaware
General  Corporation  Law (the "DGCL").  Section 262 of the DGCL is reprinted in
its entirety as Appendix C to this proxy  statement.  All  references in Section
262 of DGCL and in this summary to a  "stockholder"  are to the record holder or
beneficial  owner of  shares of  Concentra  common  stock as to which  appraisal
rights are  asserted.  If you have a beneficial  interest in shares of Concentra
common  stock that are held of record in the name of another  person,  such as a
broker or nominee,  you must act promptly to cause the record holder to properly
follow  the  steps  summarized  below in a timely  manner  to  perfect  whatever
appraisal rights you may have.

     The following discussion is not a complete statement of the law relating to
appraisal rights and is qualified in its entirety by reference to Appendix C. If
you wish to exercise statutory appraisal rights or preserve your right to do so,
you should review this  discussion  and Appendix C carefully to comply  strictly
with the procedures set forth herein and therein, or you may lose your appraisal
rights.

     If you elect to demand the  appraisal  of your  shares you must  deliver to
Concentra a written  demand for  appraisal  of your shares of  Concentra  common
stock  before the taking of the vote on the merger at the special  meeting.  The
demand must reasonably  inform Concentra of your identity and that you intend to
demand the  appraisal of your shares of  Concentra  common  stock.  This written
demand for appraisal of the shares of Concentra common stock must be in addition
to and  separate  from your proxy or vote  against the merger.  Voting  against,
abstaining  from voting,  or failing to vote on the merger will not constitute a
demand for  appraisal  within the meaning of Section 262. If you elect to demand
appraisal rights,  you will not be granted appraisal rights under Section 262 if
you have  either  voted in favor of the merger or  consented  thereto in writing
(including  by  granting  the proxy  solicited  by this  proxy  statement  or by
returning  a signed  proxy  without  specifying  a vote  against the merger or a
direction to abstain from such vote). Additionally, appraisal rights will not be
granted under Section 262 if you do not continuously  hold through the effective
time of the merger your shares of  Concentra  common stock with respect to which
you demand appraisal.

     You must fully and  correctly  execute a demand for  appraisal as your name
appears on the certificate or certificates representing your shares of Concentra
common stock. If your shares of Concentra  common stock are owned of record in a
fiduciary capacity, such as by a trustee,  guardian or custodian,  the fiduciary
must execute the demand.  If the shares of  Concentra  common stock are owned of
record by more than one person, as in a joint tenancy or tenancy in common,  all
joint owners must execute the demand.  An authorized  agent,  including an agent
for two or more


                                       68
<PAGE>

joint owners,  may execute your demand for  appraisal;  however,  the agent must
identify  you as the record  owner and  expressly  disclose  the fact  that,  in
exercising the demand, such person is acting as your agent.

     If you elect to exercise your  appraisal  rights,  you must mail or deliver
your written demand to the Secretary of Concentra at 5080 Spectrum Drive,  Suite
400, West Tower,  Addison,  Texas 75001.  The written  demand for appraisal must
specify your name and mailing address,  the number of shares of Concentra common
stock you own,  and that you are thereby  demanding  appraisal  of your  shares.
Within ten days after the effective  time of the merger,  Concentra must provide
notice of the effective time to all  stockholders who have complied with Section
262 and who have not voted for or consented to adoption of the merger agreement.

     Within  120  days  after  the  effective  time,  either  Concentra  or  any
stockholder  who has complied  with the required  conditions  of Section 262 may
file a petition  in the  Delaware  Court of  Chancery  (the  "Delaware  Chancery
Court") demanding a determination of the value of the shares of Concentra common
stock of the dissenting  stockholders.  If a petition for an appraisal is timely
filed,  after a hearing  on such  petition,  the  Delaware  Chancery  Court will
determine which  stockholders are entitled to appraisal rights and will appraise
the shares of Concentra common stock owned by such stockholders, determining the
fair value of such shares of Concentra common stock, exclusive of any element of
value arising from the  accomplishment  or expectation  of the merger,  together
with a fair rate of interest to be paid, if any,  upon the amount  determined to
be the fair value. In determining fair value, the Delaware  Chancery Court is to
take into account all relevant factors including:

     o market value,

     o asset value,

     o dividends,

     o earning prospects,

     o the nature of Concentra's enterprise,

     o the discounted cash flows of Concentra, and

     o any other factors that the court deems relevant.

     The court is required to determine the amount  necessary to compensate  the
stockholder  for the loss of his interest in Concentra as a going concern rather
than in a liquidation context.

     If you seek  appraisal you should know that the "fair value" of your shares
of Concentra  common stock  determined under Section 262 could be more than, the
same as, or less than the merger  consideration  you will receive in the merger,
and that the opinion of BT Alex. Brown as to fairness, from a financial point of
view,  is not an opinion as to fair value  under  Section  262.  The cost of the
appraisal  proceeding may be determined by the Delaware Chancery Court and taxed
against the  parties as the  Delaware  Chancery  Court  deems  equitable  in the
circumstances.  Upon  application  of a  dissenting  stockholder,  the  Delaware
Chancery  Court may order that all or a portion of the expenses  incurred by any
dissenting  stockholder in connection with the appraisal proceeding,  including,
without  limitation,  reasonable  attorneys'  fees and the fees and  expenses of
experts, be charged pro


                                       69
<PAGE>

rata  against  the value of all shares of  Concentra  common  stock  entitled to
appraisal.

     If you have duly  demanded  appraisal in  compliance  with Section 262, you
will not, from and after the effective  time of the merger,  be entitled to vote
for any purpose the shares of Concentra  common stock  subject to your demand or
to  receive  payment  of  dividends  or other  distributions  on your  shares of
Concentra  common  stock,  except  for  dividends  or  distributions  payable to
stockholders of record at a date prior to the effective time.

     At any time  within 60 days after the  effective  time,  you shall have the
right to withdraw  your demand for  appraisal and to accept the terms offered in
the merger.  After this period,  you may withdraw your demand for appraisal only
with the consent of  Concentra.  If no petition for  appraisal is filed with the
Delaware Chancery Court within 120 days after the effective time,  stockholders'
rights to appraisal shall cease,  and all holders of shares of Concentra  common
stock shall be entitled to receive the merger  consideration  as provided for in
the merger  agreement.  Inasmuch as Concentra  has no  obligation to file such a
petition,  and has no present  intention to do so, any  stockholder  who desires
such a petition to be filed is advised to file it on a timely basis. However, no
petition timely filed in the Delaware  Chancery Court demanding  appraisal shall
be dismissed as to any stockholder without the approval of the Delaware Chancery
Court,  and such  approval  may be  conditioned  upon such terms as the Delaware
Chancery Court deems just.


                                       70
<PAGE>

                  PRINCIPAL STOCKHOLDERS AND STOCK OWNERSHIP OF
                              MANAGEMENT AND OTHERS

         The following table sets forth certain  information with respect to the
beneficial  ownership of the Concentra  common stock as of June 30, 1999 by: (i)
each person known to Concentra to beneficially  own more than 5% of any class of
Concentra's  outstanding  voting  securities,  (ii) each  director of Concentra,
(iii) the chief  executive  officer and the four other most  highly  compensated
executive  officers of Concentra and Mr. Kiraly and (iv) all executive  officers
and  directors of Concentra as a group.  As of January 12, 1999,  Concentra  had
47,111,912 shares of its common stock outstanding.  Unless otherwise  indicated,
Concentra  believes  that each person or entity  named below has sole voting and
investment power with respect to all shares shown as beneficially  owned by such
person or entity,  subject to community  property laws where  applicable and the
information set forth in the footnotes to the table below.

<TABLE>
<CAPTION>
                                                                   SHARES
                                                                BENEFICIALLY  PERCENTAGE
                        NAMES             SHARES      OPTIONS     OWNED (1)    OF CLASS
                        ------            -------    ---------   -----------  ----------

<S>                     <C>               <C>           <C>       <C>           <C>
Welsh, Carson, Anderson & Stowe
and affiliates
320 Park Avenue
New York, NY 10022 ....................   6,343,203     836,364   7,179,567     14.97%

Massachusetts Financial Services
  Company
500 Boylston
Boston, MA 02116 ......................   5,852,888     672,785   6,525,673     13.7%


DIRECTORS
John K. Carlyle .......................         510      75,000      75,510      0.2%
George H. Conrades ....................       1,326      51,971      53,297      0.1%
Hon. Willis D. Gradison, Jr ...........       1,510       5,000       6,510      0.0%
Robert A. Ortenzio ....................      15,188      25,000      40,188      0.1%
Mitchell T. Rabkin, M.D ...............       1,326      51,971      53,297      0.1%
Richard D. Rehm, M.D ..................      10,000      38,750      48,750      0.1%
Lois E. Silverman .....................     641,512      10,000     651,512      1.4%


EXECUTIVE OFFICERS
Daniel J. Thomas ......................      33,367     389,000     422,367      0.9%
James M. Greenwood ....................      33,000     123,000     156,000      0.3%
Richard A. Parr II ....................      17,773      62,750      80,523      0.2%
Joseph F. Pesce .......................      40,411     179,803     220,214      0.5%
W. Tom Fogarty, M.D ...................      99,389     103,800     203,189      0.4%
Kenneth Loffredo ......................       1,158     101,250      38,126      0.1%
Thomas E. Kiraly ......................           0           0           0        0%
All directors and executive officers as
  a group (14 persons) ................     921,859   1,180,338   2,102,197      4.3%

</TABLE>

- -----------
         (1) A person is  considered  to  beneficially  own any  shares (a) over
which such person  exercises sole or shared voting or investment power or (b) of
which  such  person has the right to acquire  beneficial  ownership  at any time
within 60 days of January 12, 1999 (i.e. through the conversion of securities or
the  exercise of stock  options).  Shares are deemed to be  outstanding  for the
purposes of  computing  the  percentage  ownership  of the person  holding  such
shares,  but are not deemed outstanding for purposes of computing the percentage
of any other person shown on the table.



                                       71
<PAGE>

                    CERTAIN INFORMATION CONCERNING CONCENTRA

         Concentra is the leading  provider of  healthcare  management  and cost
containment services to the workers' compensation, disability and auto insurance
markets.  Concentra  also provides  out-of-network  medical claims review to the
group health marketplace and performs  non-injury  healthcare  services for over
80,000 local  employers.  Concentra offers a continuum of services to employers,
insurers  and  third-party  administrators  of all  sizes on a  non-risk-bearing
basis.  Concentra's  services allow  customers to increase the direction of care
for injury claims,  aggressively manage the costs and care plan of those claims,
and review  medical  claims  retrospectively,  thus  reducing  overall  workers'
compensation, disability, auto-insurance, and out-of-network group health costs.
Concentra  believes  that by offering  both claims  management  services and the
provision of care,  Concentra is in a unique position to provide  comprehensive,
integrated  services on a bundled or  unbundled  basis to national  and regional
accounts and local employers.


         Concentra's  continuum  of  services  is  comprised  of three  distinct
categories:  healthcare  services;  specialized cost containment  services;  and
field case management.  Concentra's field case management  organization consists
of over  1,100  full-time  field  case  managers  in 89  offices  in 49  states.
Concentra's  specialized  cost  containment  services,  including  provider bill
review,  preferred provider network  management,  out-of-network  medical claims
review   services,    first-report-of-injury,    telephonic   case   management,
precertification  and  independent  medical  examinations,  are  provided  in 85
service  locations in 49 states.  Healthcare  services  include  injury care and
physical  therapy  services for  work-related  injuries and illnesses,  physical
examinations,   substance  abuse  testing,  and  certain  other  loss-prevention
services,  and are  provided  through  169  clinics  located in 50 markets in 25
states.  Through the twelve  months  ended  December  31,  1998,  revenues  from
healthcare  services,  specialized  cost-containment  services  and  field  case
management  represented  approximately 43.0%, 29.8% and 27.2% of total revenues,
respectively.


         JOHN K.  CARLYLE has served as a Director  of  Concentra  since  August
1997. Mr. Carlyle served as Chairman of the Board of Directors of Concentra from
August 1997 to January  1998.  Mr.  Carlyle is  currently  President  and CEO of
MAGELLA Healthcare Corporation,  a private physician practice management company
devoted to the area of  neonatology  and  perinatology.  Mr.  Carlyle  served as
OccuSystems' Chairman and Chief Executive Officer from January 1997 until August
1997. He joined OccuSystems in 1990 as its President and served in that capacity
until December 1996.  Mr.  Carlyle served as the Chief  Executive  Officer and a
director of OccuSystems from 1991 until August 1997. Mr. Carlyle has served as a
director  of  National  Surgery  Centers,  Inc.,  an owner and  operator of free
standing, multi-specialty ambulatory surgery centers, since 1991. He also serves
as a director of several private companies.

         W. TOM  FOGARTY,  M.D.  has served as Senior Vice  President  and Chief
Medical Officer of Concentra since August 1997. He served as OccuSystems' Senior
Vice  President and Chief Medical  Officer from  September  1995 to August 1997.
From 1993 to September  1995,  Dr.  Fogarty served as Vice President and Medical
Director  of  OccuSystems.  From 1992 to 1993,  he served as a Regional  Medical
Director of Occu-Systems and, from 1985 until 1992, as a medical director of one
of OccuSystems' centers.


                                       72
<PAGE>

         JAMES M.  GREENWOOD has served as Executive Vice President of Corporate
Development  since  February  1998 and as Senior  Vice  President  of  Corporate
Development  of  Concentra  from  August  1997 to  February  1998.  He served as
OccuSystems'  Chief Financial Officer from 1993 when he joined  OccuSystems as a
Vice  President  until  August  1997.  Mr.  Greenwood  served  as a Senior  Vice
President of OccuSystems  since May 1994. From 1988 until he joined  OccuSystems
in 1993, Mr. Greenwood served in numerous  positions with Bank One, Texas, N.A.,
and its  predecessors,  most  recently as Senior Vice  President  and Manager of
Mergers and Acquisitions.

         THOMAS  E.  KIRALY  has  served  as  Executive  Vice  President,  Chief
Financial  Officer and Treasurer of Concentra since May 25, 1999.  Prior to that
time, Mr. Kiraly served as the principal accounting and financial officer of BRC
Holdings,  Inc.  from December 1988 to May 1999.  BRC Holdings,  Inc.,  based in
Dallas, Texas, was a diversified provider of specialized information systems and
services to health care  institutions and local  governments and was acquired in
February 1999 by Affiliated Computer Services, Inc., another Dallas, Texas based
provider of information services.  During his tenure at BRC Holdings,  Inc., Mr.
Kiraly held the titles of Executive Vice President and Chief  Financial  Officer
from March 1994 through May 1999 and Vice  President  of Finance  from  December
1988 through March 1994. Prior to that time, Mr. Kiraly was a Senior  Management
Consultant with Touche Ross & Co., a predecessor to Deloitte & Touche L.L.P.,  a
national accounting firm, from May 1985 until December 1988.

         KENNETH  LOFFREDO has served as Senior Vice  President of Marketing and
Sales since August 1997. Mr.  Loffredo  served as Vice President of Sales of CRA
from February  1995 to August 1997.  From July 1993 to January 1995 he was CRA's
Regional Sales Manager for the New England  states.  Mr.  Loffredo joined CRA in
July of 1981,  and from 1981 to June 1993,  he held  positions of Case  Manager,
Account Manager and Regional Manager.

         RICHARD  A. PARR II has served as  Executive  Vice  President,  General
Counsel and Secretary of Concentra  since August 1997. He served as OccuSystems'
Executive  Vice  President,  General  Counsel and Secretary  from August 1996 to
August 1997. Prior to joining OccuSystems, Mr. Parr served as Vice President and
Assistant  General Counsel of OrNda HealthCorp,  a national hospital  management
company, from April 1993 through August 1996 and as Associate General Counsel of
OrNda HealthCorp from September 1991 through March 1993.

         DANIEL J. THOMAS has served as a Director of  Concentra  since  January
1998. He has served as President  and Chief  Executive  Officer since  September
1998, and he served as President and Chief  Operating  Officer of Concentra from
January 1998 until  September  1998. He served as Executive  Vice  President and
President of the  Practice  Management  Services  subsidiary  of Concentra  from
August 1997 until January 1998.  He served as a director of  OccuSystems  and as
its President and Chief Operating Officer from January 1997 to August 1997. From
April 1993 through  December 1996, Mr. Thomas served as  OccuSystems'  Executive
Vice  President and Chief  Operating  Officer.  Prior to joining  OccuSystems in
1993, Mr. Thomas served in various  capacities with Medical Care  International,
Inc.,  most recently as its Senior Vice President and Divisional  Director.  Mr.
Thomas is a certified public accountant.

                                       73
<PAGE>

         All of the  individuals  listed above are United  States  citizens and,
with the exception of Messrs. Greenwood and Parr, have their business address at
312 Union Wharf, Boston,  Massachusetts  02109. Messrs.  Greenwood and Parr have
their business address at 5080 Spectrum Drive,  Suite 400, West Tower,  Addison,
Texas 75001.

         None of Concentra,  the Members of Management or any executive officer,
director  or person  controlling  Concentra  was,  during  the last  five  years
convicted in a criminal  proceeding  (excluding  traffic  violations  or similar
misdemeanors)   or  was  a  party  to  a  civil  proceeding  of  a  judicial  or
administrative body of competent jurisdiction and as a result of such proceeding
was or is  subject  to a  judgment,  decree  or  final  order  enjoining  future
violations of, or prohibiting activities subject to, federal or state securities
laws or finding any violation of such laws.

         For a more  detailed  description  of the  business and  properties  of
Concentra,  see the descriptions  thereof contained in Concentra's Annual Report
on Form 10-K for the fiscal year ended December 31, 1998,  which is incorporated
herein by reference. See "Where You Can Find More Information."

                      CERTAIN INFORMATION CONCERNING YANKEE

YANKEE


         Yankee is a newly formed Delaware  corporation  organized and currently
owned by WCAS for the purpose of effecting the merger.  The principle  executive
offices of Yankee are located at 320 Park Avenue,  New York, New York 10022. The
current  directors  of Yankee are D. Scott  Mackesy,  Andrew M. Paul and Paul B.
Queally.  The current  officers of Yankee are D. Scott Mackesey,  Andrew M. Paul
and Paul B.  Queally.  Health  Care  Partners  L.P.  and Health  Care  Executive
Partners L.P.,  affiliates of Ferrer Freeman Thompson & Co., LLC, have agreed to
purchase about 7% of Yankee's  capital stock prior to the merger.  Chase Capital
Partners,  DLJInvestment Partners and some of its affiliates, and the Members of
Management (the "Other  Investors")  have agreed to acquire about 5% of Yankee's
capital stock prior to the merger.  Health Care Capital  Partners may assign its
rights to purchase  that  capital  stock to  affiliates,  members or partners of
Ferrer Freeman Thompson & Co., LLC.


EQUITY INVESTORS

         WCAS

         WCAS is a private  investment  firm  based in New York and  founded  in
1979.  WCAS  currently  manages  over $7 billion in private  equity  capital and
focuses primarily on the healthcare and information services  industries.  Since
1979,  WCAS has completed over eighty  leveraged  buyouts  concentrated in these
industries.  The  principal  executive  offices of WCAS are  located at 320 Park
Avenue, New York, New York 10022 and its telephone number is (212) 893-4500. The
sole general  partner of WCAS is WCAS VIII  Associates  LLC, a Delaware  limited
liability company ("WCAS VIII Associates").

                                       74
<PAGE>

         WCAS VIII ASSOCIATES

         The  principal  business of WCAS VIII  Associates is acting as the sole
general  partner of WCAS.  Each  managing  member of WCAS VIII  Associates  is a
citizen of the United States.  The principal  occupation of each managing member
of WCAS VIII  Associates  is being a general  partner or managing  member of the
partnerships  and limited  liability  companies  which serve as the sole general
partners of the private investment  partnerships which are affiliated with WCAS.
The managing  members of WCAS VIII Associates are Bruce K. Anderson,  Russell L.
Carson,  Priscilla A. Newman, Anthony J. de Nicola, Thomas E. McInerney,  Andrew
M. Paul, Paul B. Queally,  Jonathan M. Rather, Lawrence B. Sorrell, Laura M. Van
Buren, and Patrick J. Welsh.

         FERRER FREEMAN

         Ferrer  Freeman  is a private  investment  firm  based in  Connecticut.
Ferrer Freeman  manages two private equity funds,  Health Care Capital  Partners
and Health Care Executive Partners, which are dedicated to making investments in
the health care industry. The principal offices of Ferrer Freeman are located at
The Mill, 10 Glenville  Street,  Greenwich,  Connecticut 06831 and its telephone
number is (203) 532-8011.

         In connection with its investment in Yankee, Ferrer Freeman has entered
into a subscription  agreement to purchase  1,854,545 shares of Yankee's Class A
common stock immediately prior to the merger,  representing  approximately 7% of
Yankee's  outstanding  capital  stock.  The  Class A common  stock of  Yankee is
identical  in all  respects to  Yankee's  common  stock  except that the Class A
common stock is entitled to elect one member to Yankee's board of directors. The
merger agreement  provides that, at the effective time of the merger,  shares of
Yankee's  Class A common stock will be converted  into an equal number of shares
of Class A common  stock of Concentra  with the same rights as Yankee's  Class A
common stock prior to the merger.


         In  connection  with its  investment  in  Yankee,  WCAS  and the  Other
Investors  have agreed to purchase  23,742,187  shares of Yankee's  common stock
immediately  prior to the  merger,  representing  approximately  93% of Yankee's
outstanding  capital stock.  WCAS and the Other Investors intend to enter into a
definitive  purchase  agreement similar to the one executed by Ferrer Freeman to
purchase these shares. The merger agreement provides that, at the effective time
of the merger,  shares of Yankee's  common stock will be converted into an equal
number of shares of  Concentra  common  stock with the same  rights as  Yankee's
common stock prior to the merger.

         WCAS, the Other Investors, Ferrer Freeman and Concentra intend to enter
into a stockholders  agreement.  The stockholders agreement will not provide for
any agreements with WCAS, the Other Investors and Ferrer Freeman with respect to
voting  of  shares  or  management  of  Concentra   following  the  merger.  The
stockholders agreement will provide for:


         o limitations on the transfer of shares owned by the investors:

         o tag  along  rights  for  Ferrer  Freeman,  the  Other  Investors  and
           affiliates  of WCAS other



                                       75
<PAGE>

           than  WCAS,  to  participate in  proposed  dispositions of  Concentra
           common stock by WCAS:

         o in the event that WCAS  receives a third  party  offer to  purchase a
           significant  portion of the outstanding  Concentra common stock, WCAS
           may  require the other  investors  to accept the offer and sell their
           shares of Concentra to the third party: and

         o preemptive  rights to the  investors  to  participate,  on a pro rata
           basis  according to their  ownership of Concentra  capital stock,  in
           equity offerings of Concentra with certain customary exceptions.


         Simultaneously with the execution of the stockholders agreement,  WCAS,
the Other  Investors,  Ferrer  Freeman  and  Concentra  intend  to enter  into a
registration  rights agreement.  The registration rights agreement will give the
investors  rights to require  Concentra  to register  their  shares of Concentra
capital  stock under the  Securities  Act of 1933 and to include,  upon request,
their shares in any other registration of shares by Concentra.


         None of WCAS, WCAS VIII Associates or any executive  officer,  director
or person controlling any member of WCAS or WCAS VIII Associates was, during the
last  five  years,   convicted  in  a  criminal  proceeding  (excluding  traffic
violations or similar  misdemeanors)  or was a party to a civil  proceeding of a
judicial or  administrative  body of competent  jurisdiction  and as a result of
such proceeding was or is subject to a judgment, decree or final order enjoining
future  violations  of, or prohibiting  activities  subject to, federal or state
securities  laws or finding any violation of such laws. Each person listed below
is a citizen of the United States unless noted otherwise.

         The business address of each managing member of WCAS VIII Associates is
320 Park Avenue, New York, New York 10022.

         Except as disclosed  below,  over the last five years the only material
occupation,  position,  offices or employments  for each managing member of WCAS
VIII  Associates  has only been as a general  partner or managing  member of the
partnerships  and limited  liability  companies  which serve as the sole general
partners of the private investment partnerships which are affiliated with WCAS.

         D. SCOTT MACKESY is a citizen of Canada and his principal occupation is
as an  employee  of WCAS  Management  Corporation,  an  affiliate  of WCAS.  Mr.
Mackesy's  business  address is 320 Park Avenue,  Suite 2500, New York, New York
10022-6815. Prior to joining WCAS in 1998, Mr. Mackesy was employed from 1992 to
1998 by Morgan  Stanley Dean Winter & Co., most recently as a Vice  President in
its investment research department.  The address of Morgan Stanley Dean Winter &
Co. is 1585 Broadway, New York, New York 10036.

         Prior to joining WCAS in 1994, Mr. de Nicola was employed from 1990  to
1994 by William Blair & Company,  a private equity  investment firm. The address
of William Blair & Company, L.L.C. is 222 West Adams Street,  Chicago,  Illinois
60606.

                                       76


<PAGE>


         Prior to joining  WCAS in  February  1996,  Mr.  Queally  held  various
positions,  including,  most  recently,  General  Partner,  at The Sprout Group,
Donaldson,  Lufkin &  Jenrette  Inc.'s  private  equity  group  from May 1987 to
February  1996.  The address of Donaldson,  Lufkin & Jenrette,  Inc. is 277 Park
Avenue, New York, New York 10172.

         Prior to joining  WCAS in May 1999,  Jonathan M. Rather was employed as
Chief Operating Officer and Chief Financial Officer of Goelet  Corporation.  The
address of Goelet Corporation is 425 Park Avenue, 28th Floor, New York, New York
10022.

         Prior to joining  WCAS in May 1999,  Jonathan M. Rather was employed as
Chief Operating Officer and Chief Financial Officer of Goelet  Corporation.  The
address of Goelet Corporation is 425 Park Avenue, 28th Floor, New York, New York
10022.

         Prior to joining WCAS in June 1998, Mr. Sorrel was employed as a senior
executive  at Morgan  Stanley  Dean Winter & Co.  working in its private  equity
investment business,  most recently, as a Managing Director.  Mr. Sorrell joined
Morgan Stanley & Co. in 1986. The address of Morgan Stanley Dean Winter & Co. is
1585 Broadway, New York, New York 10036.

         SEAN  M.  TRAYNOR'S  principal  occupation  is as an  employee  of  WCA
Management Corporation,  an affiliate of WCAS. Mr. Traynor's business address is
320 Park Avenue,  Suite 2500,  New York, New York  10022-6815.  Prior to joining
WCAS in April 1999, Mr. Traynor was employed from 1996 to April 1999 by BT Alex.
Brown  Incorporated,  as an Associate in its investment  banking  division.  The
address of BT Alex. Brown Incorporated is One South Street, Baltimore,  Maryland
21202. From June to August 1995, Mr. Traynor was employed by The Chase Manhattan
Bank, as an Associate in its corporate finance department.

The address of The Chase  Manhattan Bank is 270 Park Avenue,  New York, New York
10017.

                  PURCHASES OF COMMON STOCK BY CERTAIN PERSONS


                             NUMBER OF
                              SHARES           NUMBER OF
                             PURCHASED        CONVERTIBLE        PRICE PAID
PARTY        DATE              (SOLD)       NOTES PURCHASED   PER SHARE OR NOTE
- - -----      -------         -----------     ---------------    ----------------
WCAS        9/08/98          250,000                                $ 6.10
            9/09/98          625,000                                $ 6.73
            9/10/98          625,000                                $ 7.02
            9/11/98          624,763                                $ 7.66
           10/20/98          200,000           7,000           $10.14 per Share;
                                                               $72.84 per Note
           10/21/98          165,000           3,000           $10.72 per Share;
                                                               $74.17 per Note
           10/22/98          190,000                                $10.35
           10/23/98          150,000           2,000           $ 9.98 per Share;
                                                               $74.00 per Note
           10/26/98           50,000           2,500           $10.44 per Share;
                                                               $74.50 per Note
           10/27/98          350,000           2,000           $10.71 per Share;
                                                               $75.00 per Note
           10/29/98          485,000           2,000           $10.60 per Share;
                                                               $75.00 per Note
           10/30/98          135,000                                $10.68
           11/02/98           50,000                                $10.63
           11/09/98                            1,000                $75.00
           11/18/98           50,000                                $10.44



                                       77
<PAGE>



<TABLE>
<CAPTION>

                                               NUMBER OF
                                                SHARES           NUMBER OF
                                               PURCHASED        CONVERTIBLE              PRICE PAID
PARTY                         DATE              (SOLD)        NOTES PURCHASED         PER SHARE OR NOTE
- - ------                       -------          -----------     ---------------         ----------------
<S>                          <C>               <C>                  <C>              <C>
                            11/19/98           30,000                                $10.50
                            11/20/98           40,000                                $10.69
                            11/23/98                            1,000                $76.25
                            11/25/98                            1,000                $78.00
                            12/01/98                            2,000                $79.00
                            12/03/98                            3,000                $78.50
                            12/04/98                            1,000                $79.00
                             1/05/99           65,000                                $10.12
                             1/06/99           40,000           2,000                $10.50 per Share;
                                                                                     $78.50 per Note
                             1/07/99           175,000          1,000                $10.33 per Share;
                                                                                     $79.00 per Note
                             1/08/99           475,000                               $10.49 per Share
                             1/11/99           225,000          2,000                $10.84 per Share;
                                                                                     $78.50 per Note
                             1/12/99         1,300,000                               $10.73
                             7/02/99           (22,500)                              $14.68
                             7/06/99           (67,500)                              $14.58
Carlyle                        11/97        227,200(9)
                                5/98            510(2)
                                             80,000(3)

Conrades                        9/97            459(1)
                                5/98            510(2)

Gradison                        5/98            510(2)
Ortenzio                        9/97            451(1)

                                5/98            510(2)

Rabkin                          9/97            459(1)
                                5/98            510(2)

Silverman                       9/97            459(1)
                                5/98            510(2)

Greenwood                      11/97         62,500(8)
                                5/98         15,000(2)

Loffredo                       11/97         15,000(4)
                                1/98            176(5)
                                6/98            452(6)
Parr                           11/97          6,000(4)

                                1/98            476(5)
                                6/98            312(6)
                                8/98          1,000(7)
                                1/99           761(10)
Pesce                          11/97         24,000(4)
                                1/98            472(5)
                                5/98          9,000(2)
                                6/98            657(6)
                                1/99         1,583(10)
Thomas                          5/98          9,000(2)

</TABLE>

FOOTNOTES   1 - Restricted Shares Granted 9/1/97 at $32.75
            2 - Restricted Shares Granted 5/13/98 at $29.4375
            3 - Acquired Through Exercise Of 50,000 Options at $19.50 And
                30,000 Restricted Shares at $0
            4 - Restricted Shares Granted 11/1/97 at $32.625
            5 - Shares Purchased Through Employee Stock Purchase Plan at $24.86
            6 - Shares Purchased Through Employee Stock Purchase Plan at $22.10
            7 - Shares Purchased Through Open Market at $19.00
            8 - Shares  Acquired  Through  Exercise of Stock  Options As
                Follows:  5,000 on  11/4/97  at $4.00,  7,500 on  11/4/97 at
                $6.00,  15,000 on  11/4/97  at $7.00,  12,500 on  11/4/97 at
                $12.00,  7,500 on 11/14/97  at $12.00,  4,000 on 11/14/97 at
                $19.50,  5,000 on 11/25/97 at $19.50,  31,000 on 11/26/97 at
                $19.50
            9 - Shares  Acquired  Through  Exercise of Stock Option As
                Follows:  37,200 on 11/5/97  at $4.00,  60,000 on 11/5/97 at
                $12.00,  40,000 on 11//6/97  at $7.00,  15,000 on 11/7/97 at
                $7.00,  25,000 on 11/18/97  at $7.00,  10,000 on 11/21/97 at
                $19.50
           10 - Shares Purchased Through Employee Stock Purchase
                Plan on January 1, 1999 at $9.0843


                                       78
<PAGE>


                              INDEPENDENT AUDITORS

         The  consolidated  balance  sheets of Concentra as of December 31, 1997
and December 31, 1998,  and the related  consolidated  statements  of operation,
stockholders'  equity and cash  flows for each of the three  years in the period
ended December 31, 1998,  incorporated by reference in this proxy statement have
been audited by Arthur Andersen L.L.P., independent auditors, as stated in their
report.  A  representative  of Arthur  Andersen  L.L.P.  will be at the  special
meeting to answer  appropriate  questions  from  stockholders  and will have the
opportunity to make a statement if so desired.

                              STOCKHOLDER PROPOSALS

         Any  proposals  of holders of  Concentra  common  stock  intended to be
presented at the annual meeting of  stockholders of Concentra to be held in 1999
must have been  received by  Concentra  no later than  December  1, 1998,  to be
included  in  Concentra's  proxy  statement  and form of proxy  relating to that
meeting.

                                  OTHER MATTERS

         As of the date of this  proxy  statement,  the Board  knows of no other
business to be presented at the special  meeting.  If other  matters do properly
come before the meeting, or any adjournments or postponements thereof, it is the
intention  of the  persons  named in the proxy to vote on such  matters in their
sole discretion.

                       WHERE YOU CAN FIND MORE INFORMATION

         Concentra files annual, quarterly and current reports, proxy statements
and  other  information  with  the SEC.  You may  read  and  copy  any  reports,
statements  or  other  information  that  Concentra  files at the  SEC's  public
reference rooms in Washington,  D.C., New York, New York and Chicago,  Illinois.
Please  call the SEC at  1-800-SEC-0330  for further  information  on the public
reference rooms.  Concentra public filings are also available to the public from
commercial  document  retrieval services and at the Internet World Wide Web site
maintained by the SEC at http://www.sec.gov. Reports, proxy statements and other
information  concerning  Concentra  also may be  inspected at the offices of the
National  Association  of  Securities  Dealers,   Inc.,  1735  K  Street,  N.W.,
Washington, D.C. 20006.

         The SEC allows Concentra to "incorporate by reference" information into
this document,  which means that Concentra can disclose important information to
you by referring  you to another  document  filed  separately  with the SEC. The
information  incorporated  by reference is deemed to be a part of this document,
except for any information  superseded by information contained directly in this
document.  This  document  incorporates  by  reference  certain  documents  that
Concentra has previously filed with the SEC. These documents  contain  important
business information about Concentra and its financial condition.

                                       79
<PAGE>

         Concentra  may have sent to you some of the documents  incorporated  by
reference,  but you can obtain  any of them  through  Concentra,  the SEC or the
SEC's Internet World Wide Web site described  above.  Documents  incorporated by
reference are available from Concentra without charge, excluding exhibits unless
specifically   incorporated  by  reference  as  an  exhibit  to  this  document.
Stockholders may obtain documents  incorporated by reference in this document by
requesting  them  in  writing  or by  telephone  at the  following  address  and
telephone number:

                          Concentra Managed Care, Inc.
                   5080 Spectrum Drive, Suite 400, West Tower
                              Addison, Texas 75001
                                  972/364-8043
                 Attention: Richard A. Parr II, General Counsel

         Statements  contained  in  this  proxy  statement  or in  any  document
incorporated  herein by  reference  as to the  contents of any contract or other
document referred to herein or therein are not necessarily  complete and in each
instance  reference  is made to such  contract  or  other  document  filed as an
exhibit  to such  other  document,  and each  such  statement  shall  be  deemed
qualified in its entirety by such reference.


         If you would like to request documents from Concentra,  please do so at
least five  business  days  before the date of the  special  meeting in order to
receive timely delivery of such documents prior to the special meeting.


         You should rely only on the  information  contained or  incorporated by
reference in this document to vote your shares at the special meeting. Concentra
has not authorized anyone to provide you with information that is different from
what is contained in this document. This document is dated ______________, 1999.
You  should  not assume  that the  information  contained  in this  document  is
accurate as of any date other than that date,  and the mailing of this  document
to  stockholders  does not create any  implication  to the contrary.  This proxy
statement  does not  constitute a  solicitation  of a proxy in any  jurisdiction
where,  or to or from any  person to whom,  it is  unlawful  to make such  proxy
solicitation in such jurisdiction.

                 INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE

         The following documents  previously filed with the SEC by Concentra are
incorporated by reference in this proxy statement:

         (i)  Concentra's  Annual  Report on Form 10-K for the fiscal year ended
December 31, 1998; and

         (ii)  Concentra's  Current Reports on Form 8-K filed on February 4,
1999,  March 3, 1999, March 29, 1999 and April 28,1999.

         (iii)  Concentra's  Quarterly Report on Form 10-Q for the quarter ended
March 31, 1999.

                                       80
<PAGE>


         All  documents  filed by  Concentra  with the SEC  pursuant to Sections
13(a), 13(c), 14 and 15(d) of the Securities Exchange Act of 1934 after the date
hereof  and  prior to the date of the  special  meeting  shall be  deemed  to be
incorporated  by  reference  herein and shall be a part  hereof from the date of
filing of such documents. Any statements contained in a document incorporated by
reference  herein or  contained  in this proxy  statement  shall be deemed to be
modified  or  superseded  for  purposes  hereof to the extent  that a  statement
contained  herein (or in any other  subsequently  filed  document  which also is
incorporated by reference  herein)  modifies or supersedes  such statement.  Any
statement  so modified or  superseded  shall not be deemed to  constitute a part
hereof except as so modified or superseded.





                                       81
<PAGE>




                                   APPENDIX A

                              AMENDED AND RESTATED

                          AGREEMENT AND PLAN OF MERGER

                                 BY AND BETWEEN

                            YANKEE ACQUISITION CORP.,

                                       AND

                          CONCENTRA MANAGED CARE, INC.

                           DATED AS OF MARCH 24, 1999



<PAGE>

                                TABLE OF CONTENTS
                                                                           Page

Article 1         The Merger

  1.1   The Merger ......................................................   A-2
  1.2   Closing .........................................................   A-2
  1.3   Effective Time of the Merger ....................................   A-2
  1.4   Effects of the Merger ...........................................   A-2


ARTICLE 2 EFFECT OF THE MERGER ON THE CAPITAL STOCK
OF THE CONSTITUENT CORPORATIONS

  2.1   Effect on Capital Stock .........................................   A-3
  2.2   Exchange of Certificates ........................................   A-4
  2.3   Stock Plans .....................................................   A-6


ARTICLE 3 REPRESENTATIONS AND WARRANTIES

  3.1   Representations and Warranties of the Company ...................   A-7
  3.2   Representations and Warranties of Newco .........................  A-20


ARTICLE 4 COVENANTS RELATING TO CONDUCT OF BUSINESS

   4.1  Affirmative Covenants of the Company ............................  A-23
   4.2  Negative Covenants of the Company ...............................  A-23


ARTICLE 5  ADDITIONAL AGREEMENTS
   5.1  Access to Information ...........................................  A-26
   5.2  No Solicitation .................................................  A-26
   5.3  Fees and Expenses ...............................................  A-27
   5.4  Brokers or Finders ..............................................  A-28
   5.5  Indemnification; Directors' and Officers' Insurance .............  A-28
   5.6  Reasonable Efforts ..............................................  A-31
   5.7  Publicity .......................................................  A-31
   5.8  HSR and Other Governmental Approvals ............................  A-31
   5.9  Notification of Certain Matters .................................  A-32
   5.10 Continuation of Employee Benefits ...............................  A-32
   5.11 Preparation of the Proxy Statement; Stockholders Meeting ........  A-33
   5.12 Solvency Letter .................................................  A-33
   5.13 Recapitalization ................................................  A-34
   5.14 Other Actions ...................................................  A-34

                                       ii
<PAGE>



                                                                       Page

 ARTICLE 6 CONDITIONS PRECEDENT

   6.1  Conditions to Each Party's Obligation to Effect the Merger ...  A-34
   6.2  Conditions to Obligations of Newco ...........................  A-35
   6.3  Conditions to Obligation of the Company ......................  A-36


ARTICLE 7 TERMINATION AND AMENDMENT

   7.1  Termination ..................................................  A-36
   7.2  Effect of Termination ........................................  A-38
   7.3  Amendment ....................................................  A-38
   7.4  Extension; Waiver ............................................  A-38


ARTICLE 8 GENERAL PROVISIONS

   8.1  Nonsurvival of Covenants and Agreements ......................  A-38
   8.2  Confidentiality Agreements ...................................  A-38
   8.3  Notices ......................................................  A-38
   8.4  Interpretation ...............................................  A-40
   8.5  Counterparts .................................................  A-40
   8.6  Entire Agreement; No Third Party Beneficiaries ...............  A-40
   8.7  Governing Law ................................................  A-40
   8.8  Assignment ...................................................  A-40
   8.9  Effectiveness ................................................  A-41
   8.10 Reference; No Waiver .........................................  A-41

                                       iii
<PAGE>


SCHEDULES
Schedule 2.3            --  Stock Plans
Schedule 3.1(a)         --  Company Subsidiaries
Schedule 3.1(b)(i)      --  Company Capital Structure
Schedule 3.1(b)(ii)     --  Registration Rights Agreement and Voting Agreements
Schedule 3.1(b)(iii)    --  Company Subsidiary Capital Structure
Schedule 3.1(c)(ii)     --  Company Violations; Consents and Approvals
Schedule 3.1(c)(iii)    --  Required Filings and Consents
Schedule 3.1(f)         --  Company Defaults
Schedule 3.1(h)         --  Company Litigation
Schedule 3.1(i)         --  Company Taxes
Schedule 3.1(j)(i)      --  Company Employment Agreements
Schedule 3.1(j)(ii)     --  Company Plans
Schedule 3.1(j)(iv)     --  Company Determination Letters
Schedule 3.1(j)(v)      --  Plan Operation and Administration
Schedule 3.1(j)(xiii)   --  Other Employee Benefits
Schedule 3.1(j)(xiv)    --  Certain Consequences of Consummation of Transaction
Schedule 3.1(k)         --  Absence of Certain Changes or Events
Schedule 3.1(q)         --  Company Intellectual Property
Schedule 3.1(r)         --  Company Insurance Matters
Schedule 4.2(d)         --  Approved Acquisitions
Schedule 5.4(b)         --  Newco Brokers and Finders
Schedule 5.5(e)         --  Company Indemnification Agreements
Schedule 5.10           --  Continuation of Employee Benefits

                                       iv
<PAGE>

                              AMENDED AND RESTATED

                          AGREEMENT AND PLAN OF MERGER

         This Amended And  Restated  Agreement  And Plan Of Merger,  dated as of
March 24,  1999 (this  "Agreement"),  is made and  entered  into by and  between
Yankee  Acquisition  Corp.,  a Delaware  corporation  ("Newco"),  and  Concentra
Managed Care, Inc., a Delaware corporation (the "Company").

                                    RECITALS

         Whereas, Newco and the Company have entered into that certain Agreement
and Plan of Merger dated as of March 2, 1999 (the "Original Merger Agreement");

         Whereas, subsequent to the date of the Original Merger Agreement, Newco
and the Company have each determined that it is in the best interests of each of
the  foregoing  entities and their  respective  stockholders  to enter into this
Agreement, which amends and restates the Original Merger Agreement;

         Whereas,  the Board of  Directors  of each of Newco and the Company (in
the case of the  Company  acting  through  a  special  committee  (the  "Special
Committee")  formed for the purposes of  representing  the Company in connection
with the transactions  contemplated  hereby) has unanimously deemed it advisable
and in the best interests of their  respective  stockholders  for Newco to merge
with and into the Company (the "Merger") pursuant to Section 251 of the Delaware
General  Corporation  Law  (the  "DGCL")  upon  the  terms  and  subject  to the
conditions set forth herein;

         Whereas,  the Board of  Directors  of each of Newco and the Company has
unanimously adopted resolutions approving and declaring advisable this Agreement
and the Merger;

         Whereas, Newco and the Company desire to make certain  representations,
warranties,  covenants and agreements in connection  with the Merger and also to
prescribe various conditions to the Merger; and

         Whereas,   it  is   intended   that  the  Merger  be   recorded   as  a
recapitalization for financial reporting purposes.




                                      A-1
<PAGE>


                                   AGREEMENT

         Now,   Therefore,   in   consideration   of  the   foregoing   and  the
representations,  warranties,  covenants and agreements  herein  contained,  the
parties hereto, intending to be legally bound, hereby agree as follows:

                                    ARTICLE 1

                                   THE MERGER

         1.1 THE MERGER.  Upon the terms and subject to the conditions set forth
in this Agreement,  and in accordance with the DGCL,  Newco shall be merged with
and into the Company at the  Effective  Time (as  hereinafter  defined).  At the
Effective Time, the separate  corporate  existence of Newco shall cease, and the
Company shall continue as the surviving  corporation  under the name  "Concentra
Managed Care, Inc." Newco and the Company are sometimes  hereinafter referred to
as the "Constituent  Corporations" and, as the context requires,  the Company is
sometimes hereinafter referred to as the "Surviving Corporation."

         1.2 CLOSING.  Unless this Agreement  shall have been terminated and the
transactions  herein  contemplated shall have been abandoned pursuant to Section
7.1, and subject to the  satisfaction  or waiver of the  conditions set forth in
Article 6, the closing of the Merger (the  "Closing")  shall take place at 10:00
a.m. on a date to be specified by the parties  hereto,  as promptly as practical
(but in no event later than the second business day) after  satisfaction  and/or
waiver of all of the conditions set forth in Article 6 (the "Closing Date"),  at
the offices of Reboul,  MacMurray,  Hewitt,  Maynard & Kristol,  45  Rockefeller
Plaza, New York, New York 10111, unless another date, time or place is agreed to
in writing by the parties hereto.

         1.3  EFFECTIVE  TIME OF THE MERGER.  Subject to the  provisions of this
Agreement, the parties hereto shall cause the Merger to be consummated by filing
a  certificate  of merger (the  "Certificate  of Merger")  with the Secretary of
State of the State of Delaware,  as provided in the DGCL, as soon as practicable
after the Closing. The Merger shall become effective upon such filing or at such
time  thereafter as is provided in the  Certificate of Merger as the Company and
Newco shall agree (the "Effective Time").

         1.4  EFFECTS OF THE MERGER.

              (a) The  Merger  shall  have the  effects  as set  forth  in  the
applicable provisions of the DGCL.

             (b)  The  directors  of  Newco  and  the  officers  of the  Company
immediately  prior to the  Effective  Time shall,  from and after the  Effective
Time, be the initial  directors and officers of the Surviving  Corporation until
their  successors  have been duly elected or appointed and  qualified,  or until
their earlier  death,  resignation  or removal in accordance  with the Surviving
Corporation's Certificate of Incorporation and Bylaws.

                                      A-2
<PAGE>

             (c) The Certificate of  Incorporation  of Newco as in effect at the
Effective  Time  shall be the  Certificate  of  Incorporation  of the  Surviving
Corporation following the Merger until thereafter amended in accordance with its
terms and the DGCL.

             (d) The Bylaws of Newco as in effect at the Effective Time shall be
the Bylaws of the Surviving  Corporation  following the Merger until  thereafter
changed or amended as provided by the DGCL, the Certificate of  Incorporation of
the Surviving Corporation or the Bylaws of the Surviving Corporation.

                                    ARTICLE 2

    EFFECT OF THE MERGER ON THE CAPITAL STOCK OF THE CONSTITUENT CORPORATIONS

             2.1 EFFECT ON CAPITAL STOCK. As of the Effective Time, by virtue of
the  Merger  and  without  any action on the part of the holder of any shares of
common  stock,  par value $.01 per share,  of the Company (the  "Company  Common
Stock") or any shares of capital stock of Newco:

                 (a) COMMON  STOCK OF NEWCO.  Each share of common  stock,  par
value $.01 per share, of Newco (the "Newco Common Stock") issued and outstanding
immediately  prior to the Effective  Time shall be converted into and become one
fully paid and nonassessable share of common stock, par value $.01 per share, of
the Surviving  Corporation.  Each share of Class A common stock,  par value $.01
per share,  of Newco (the "Newco Class A Common Stock")  issued and  outstanding
immediately  prior to the Effective  Time shall be converted into and become one
fully paid and  nonassessable  share of Class A common stock, par value $.01 per
share, of the Surviving Corporation.

                 (b)  CANCELLATION  OF TREASURY STOCK AND  NEWCO-OWNED  COMPANY
COMMON STOCK.  Each share of Company  Common Stock that is owned by Newco or any
subsidiary  or  affiliate  of  Newco  or held  in the  treasury  of the  Company
(collectively,  the  "Excluded  Shares")  shall  automatically  be canceled  and
retired and shall cease to exist,  and no cash,  Company  Common  Stock or other
consideration shall be delivered or deliverable in exchange therefor.

                 (c) CONVERSION OR RETENTION OF COMPANY COMMON STOCK. Except as
otherwise  provided  herein,  each  share of  Company  Common  Stock  issued and
outstanding  immediately  prior to the Effective Time other than Excluded Shares
or Dissenting  Shares (as defined in Section 2.1(d)) shall be converted into the
right to receive in cash from the Surviving  Corporation following the Merger an
amount equal to $16.50 (the "Merger Consideration").

                 (d)  DISSENTING  SHARES.   Notwithstanding  anything  in  this
Agreement to the  contrary,  shares of Company  Common Stock that are issued and
outstanding  immediately  prior  to the  Effective  Time  and that are held by a
holder who has  validly  demanded  payment  of the fair value for such  holder's
shares as  determined in  accordance  with Section 262 of the DGCL  ("Dissenting
Shares") shall not be converted into or be exchangeable for the right to receive
the Merger


                                      A-3
<PAGE>

Consideration  (but instead shall be converted into the right to receive payment
from the  Surviving  Corporation  with  respect  to such  Dissenting  Shares  in
accordance  with the DGCL),  unless and until such  holder  shall have failed to
perfect or shall have  effectively  withdrawn or lost such holder's  right under
the DGCL.  If any such  holder  shall  have  failed  to  perfect  or shall  have
effectively  withdrawn  or lost such right,  each share of such holder  shall be
treated as a share of Company  Common  Stock that had been  converted  as of the
Effective Time into the right to receive the Merger  Consideration in accordance
with Section 2.1(c). Concentra shall give prompt notice to Newco of any demands,
attempted  withdrawals of such demands and any other instruments served pursuant
to  applicable  law  received by the Company for  appraisal of shares of Company
Common Stock,  and Newco shall have the right to  participate  in and direct all
negotiations  and  proceedings  with respect to such demands.  The Company shall
not,  except with the prior  written  consent of Newco,  make any  payment  with
respect  to,  settle,  offer to settle,  or approve any  withdrawal  of any such
demands.

                 (e)  CANCELLATION AND RETIREMENT OF COMPANY COMMON STOCK. As of
the  Effective  Time,  all shares of Company  Common Stock (other than  Excluded
Shares and Dissenting  Shares) issued and outstanding  immediately  prior to the
Effective  Time,  shall no longer be  outstanding  and  shall  automatically  be
canceled and retired and shall cease to exist,  and each holder of a certificate
representing  any such shares of Company Common Stock shall,  to the extent such
certificate  represents  such  shares,  cease to have any  rights  with  respect
thereto,  except  the  right  to  receive  a cash  amount  equal  to the  Merger
Consideration per share multiplied by the number of shares so represented, to be
paid in consideration  therefor upon surrender of such certificate in accordance
with Section 2.2(b).

         2.2     EXCHANGE OF CERTIFICATES.

                 (a) EXCHANGE AGENT. Prior to the mailing of the Proxy Statement
(as defined in Section 3.1(c)(iii)), Newco shall appoint a bank or trust company
to act as exchange  agent (the  "Exchange  Agent") for the payment of the Merger
Consideration.  As soon as reasonably  practicable  as of or after the Effective
Time, the Surviving  Corporation  shall deposit with the Exchange Agent, for the
benefit of the  holders of shares of  Company  Common  Stock,  for  exchange  in
accordance with this Article 2, the aggregate  Merger  Consideration  (such cash
consideration  being  hereinafter  referred  to as  the  "Exchange  Fund").  The
Exchange  Agent shall,  pursuant to  irrevocable  instructions  of the Surviving
Corporation, make payments of the Merger Consideration out of the Exchange Fund.
The Exchange Fund shall not be used for any other purpose.

                 (b) EXCHANGE PROCEDURES. Promptly after the Effective Time, the
Surviving  Corporation shall cause the Exchange Agent to mail or deliver to each
Person (as defined in Section  3.1(a)) who was, at the Effective  Time, a holder
of  record  of  Company  Common  Stock  a  letter  of   transmittal   containing
instructions  for use by holders of Company  Common Stock to effect the exchange
of their shares of Company Common Stock for the Merger Consideration as provided
herein.  As soon as  practicable  after the  Effective  Time,  each holder of an
outstanding  certificate or certificates which prior thereto  represented shares
of Company  Common  Stock (the  "Certificates")  shall,  upon  surrender  to the
Exchange Agent of such Certificate or Certificates  (or,


                                      A-4
<PAGE>

if such shares are held in book-entry  or other  uncertificated  form,  upon the
entry  through a book-entry  transfer  agent of the  surrender of such shares of
Company Common Stock on a book-entry account statement (any references herein to
"Certificates"  shall be deemed to  include  references  to  book-entry  account
statements  relating to the  ownership of shares of Company  Common  Stock)) and
acceptance thereof by the Exchange Agent, be entitled to an amount of cash equal
to the  Merger  Consideration  per  share  multiplied  by the  number  of shares
represented  by  such   Certificate.   The  Exchange  Agent  shall  accept  such
Certificates  upon compliance  with such reasonable  terms and conditions as the
Exchange  Agent may impose to effect an orderly  exchange  thereof in accordance
with normal  exchange  practices.  After the Effective  Time,  there shall be no
further  transfer  on the  records  of the  Company  or its  transfer  agent  of
Certificates,  and  if  such  Certificates  are  presented  to the  Company  for
transfer,  they shall be canceled against delivery of the Merger  Consideration.
If cash is to be  remitted  to a name other  than that in which the  Certificate
surrendered for exchange is registered, it shall be a condition of such exchange
that the Certificate so surrendered shall be properly  endorsed,  with signature
guaranteed,  or  otherwise in proper form for  transfer.  Until  surrendered  as
contemplated by this Section  2.2(b),  each  Certificate  shall be deemed at any
time after the Effective  Time to represent  only the right to receive upon such
surrender the Merger  Consideration  as contemplated by Section 2.1. No interest
will be paid or will accrue on any cash payable as Merger Consideration.

                 (c)  NO  FURTHER  OWNERSHIP  RIGHTS  IN  COMPANY  COMMON  STOCK
EXCHANGED  FOR  CASH.   All  cash  paid  upon  the  surrender  for  exchange  of
Certificates  representing shares of Company Common Stock in accordance with the
terms of this  Article 2 shall be deemed to have been paid in full  satisfaction
of all rights  pertaining  to the shares of Company  Common Stock  exchanged for
cash theretofore represented by such Certificates.

                 (d)  TERMINATION  OF EXCHANGE FUND. Any portion of the Exchange
Fund which remains undistributed to the holders of the Certificates for 183 days
after the Effective Time shall be delivered to the Surviving Corporation and any
holders  of shares of  Company  Common  Stock  prior to the  Merger who have not
theretofore  complied  with  this  Article 2 shall  thereafter  look only to the
Surviving  Corporation and only as general  creditors thereof for payment of the
Merger Consideration.

                 (e) NO LIABILITY.  None of Newco, the Surviving  Corporation or
the Exchange Agent shall be liable to any Person in respect of any cash from the
Exchange  Fund  delivered  to a  public  official  pursuant  to  any  applicable
abandoned property, escheat or similar law.

                 (f)  INVESTMENT  OF EXCHANGE  FUND.  The  Exchange  Agent shall
invest any cash in the Exchange Fund, as directed by the Surviving  Corporation,
on a daily basis.  Any interest and other income resulting from such investments
shall be paid to the Surviving Corporation.  To the extent that there are losses
with respect to such  investments,  or the Exchange  Fund  diminishes  for other
reasons  below  the  level  required  to  make  prompt  payments  of the  Merger
Consideration as contemplated  hereby, the Surviving  Corporation shall promptly
replace or restore the portion of the Exchange Fund lost through  investments or
other events so as to ensure that the Exchange Fund is, at all times, maintained
at a level sufficient to make such payments.

                                      A-5
<PAGE>

                 (g)  WITHHOLDING  RIGHTS.  The Surviving  Corporation  shall be
entitled  to  deduct  and  withhold  from the  consideration  otherwise  payable
pursuant to this  Agreement to any holder of shares of Company Common Stock such
amounts as the  Surviving  Corporation  is required to deduct and withhold  with
respect to the making of such payment  under the Internal  Revenue Code of 1986,
as amended (the "Code"), or any provision of state, local or foreign tax law. To
the  extent  that  amounts  are  so  deducted  and  withheld  by  the  Surviving
Corporation,  such  withheld  amounts  shall be treated for all purposes of this
Agreement  as having  been paid to the holder of the  shares of  Company  Common
Stock in  respect  of  which  such  deduction  and  withholding  was made by the
Surviving Corporation.

                 (h) LOST CERTIFICATES. If any Certificate shall have been lost,
stolen or destroyed,  upon the making of an affidavit of that fact by the Person
claiming such  Certificate  to be lost,  stolen or destroyed and, if required by
the  Surviving  Corporation,  the  posting  by  such  Person  of a bond  in such
reasonable amount as the Surviving  Corporation may require as indemnity against
any claim that may be made  against it with  respect  to such  Certificate,  the
Exchange  Agent  will  issue in  exchange  for such  lost,  stolen or  destroyed
Certificate the Merger Consideration payable pursuant to this Agreement.

                 2.3 STOCK PLANS.  (a) Each of the Company's  stock option plans
(the "Stock  Plans") and options to acquire  shares of Company  Common  Stock or
shares of restricted  stock of the Company  outstanding  on the date hereof (the
"Company Stock Options"),  including without limitation  information  concerning
the  date of  vesting  of such  options  or the  lapse of  restrictions  on such
restricted  stock and the acceleration of such vesting or restrictions by virtue
of the Merger or the transactions contemplated hereby, are set forth on SCHEDULE
2.3. As soon as  practicable  following  the date of this  Agreement,  except as
otherwise  may be agreed by Newco,  the Company  shall use its  reasonable  best
efforts  to  take  such  actions  (which  shall  include,   without  limitation,
attempting to obtain the consents,  if required, of the holders of Company Stock
Options) as may be  required  to effect the  cancellation  or  amendment  at the
Effective  Time of all Company  Stock Options that are stock options in exchange
for a cash payment  equal to, in the case of each such  canceled  Company  Stock
Option,  the product of (1) the excess, if any, of the Merger  Consideration per
share over the exercise price per share of such Company Stock Option and (2) the
number of shares of Company  Common Stock  subject to such Company Stock Option.
As soon as practicable  after the date of this Agreement,  the Company shall use
its reasonable  best efforts to take such action (which shall  include,  without
limitation,  attempting  to obtain  the  consents,  if  required,  of holders of
Company Stock  Options  which are shares of restricted  stock of the Company) as
may be required to effect the  cancellation  or  amendment  of all such  Company
Stock  Options  which are shares of  restricted  stock,  in exchange  for a cash
payment equal to the Merger  Consideration per share to be paid at the time such
restrictions would otherwise lapse.

                 (b) Prior to the Effective  Time, the Board of Directors of the
Company shall take all actions  necessary to provide that at the Effective Time,
the  Concentra  Managed  Care,  Inc.  Employee  Stock  Purchase  Plan  shall  be
terminated.


                                      A-6
<PAGE>




                                    ARTICLE 3

                         REPRESENTATIONS AND WARRANTIES

         3.1  REPRESENTATIONS  AND  WARRANTIES  OF  THE  COMPANY.   The  Company
represents  and  warrants  as of the date hereof (or such other date as shall be
expressly specified) to Newco as follows:

             (a)  ORGANIZATION,  STANDING AND POWER. Each of the Company and its
Subsidiaries  (as  defined  below) is a  corporation,  partnership  or a limited
liability  company duly organized,  validly  existing and in good standing under
the laws of its  respective  jurisdiction  of  incorporation,  has all requisite
corporate,  partnership or limited liability company power and authority to own,
lease and  operate  its  properties  and to carry on its  business  as now being
conducted,  and is duly  qualified  to do  business  as a  foreign  corporation,
partnership  or  limited  liability  company  and in good  standing  to  conduct
business in each  jurisdiction  in which the business it is  conducting,  or the
operation,  ownership  or leasing of its  properties,  makes such  qualification
necessary,  other  than in such  jurisdictions  where the  failure so to qualify
would not, individually or in the aggregate,  have a Material Adverse Effect (as
defined  below) with respect to the  Company.  The Company has  heretofore  made
available  to  Newco  complete  and  correct  copies  of  the   certificates  of
incorporation and bylaws (or other organizational  documents) of the Company and
its   Subsidiaries.   All   Subsidiaries  of  the  Company,   their   respective
jurisdictions  of  incorporation  or  organization,  their  respective  forms of
organization,  holders of their  respective  outstanding  capital stock or other
equity  interests,  and their  respective  jurisdictions  of qualification to do
business are identified on SCHEDULE  3.1(A).  As used in this  Agreement,  (i) a
"Material  Adverse Effect" shall mean, with respect to any party, (A) a material
adverse  effect on the  business,  operations,  assets,  financial  condition or
results of  operations of such party and its  Subsidiaries,  taken as a whole or
(B) a material  adverse effect on the ability of such party and its Subsidiaries
to perform their respective obligations under this Agreement, (ii) "Subsidiary,"
with respect to any party, means any corporation,  partnership, joint venture or
other organization,  whether  incorporated or unincorporated,  of which (A) such
party or any other  Subsidiary  of such party is a general  partner,  (B) voting
power to elect a majority of the board of directors or others performing similar
functions with respect to such corporation,  partnership, joint venture or other
organization is held by such party or by any one or more of its Subsidiaries, or
by such party and any one or more of its Subsidiaries or (C) at least 50% of the
equity  interests is, directly or indirectly,  owned or controlled by such party
or by any one or more of its Subsidiaries,  or by such party and any one or more
of its  Subsidiaries  and (iii)  "Person" shall mean any natural  person,  firm,
individual,  partnership,  joint venture,  business trust,  trust,  association,
corporation, company, unincorporated entity or other entity.

             (b) CAPITAL STRUCTURE.

                 (i) The Company. The authorized capital  stock  of the  Company
consists  of  120,000,000  shares of stock of which (A)  100,000,000  shares are
Company Common Stock and (B) 20,000,000  shares are Preferred  Stock,  par value
$.01 per share  (the "Preferred  Stock"),  of


                                      A-7
<PAGE>

which  250,000  shares  have been  designated  as Series A Junior  Participating
Preferred Stock (the "Junior Preferred  Stock").  As of the close of business on
the date hereof (the "Capitalization Date"), 47,292,199 shares of Company Common
Stock were issued and outstanding;  no shares of Preferred Stock were issued and
outstanding;  no shares  of  Company  Common  Stock  were held in the  Company's
treasury;  6,518,741  shares of Company  Common Stock were reserved for issuance
pursuant to the outstanding  Company Stock Options;  no shares were reserved for
issuance  pursuant  to the  Concentra  Managed  Care,  Inc.  401(k) Plan and CRA
Managed Care,  Inc.  Employee Stock Purchase  Plan; an  indeterminate  number of
shares  (not to exceed  500,000)  were  reserved  for  issuance  pursuant to the
Concentra  Managed Care,  Inc.  Employee  Stock  Purchase  Plan;  and there were
outstanding rights with respect to 47,292,199 one  one-thousandths of a share of
Junior Preferred Stock under the Rights Agreement dated as of September 29, 1997
between the Company and ChaseMellon  Shareholder  Services,  L.L.C. (the "Rights
Agreement").  Except as set forth on SCHEDULE 3.1(B)(I),  no bonds,  debentures,
notes or other  instruments or evidence of indebtedness of the Company ("Company
Debt") are issued and  outstanding.  Except as set forth on SCHEDULE  3.1(B)(I),
there  are no  outstanding  securities  convertible  into,  or  exchangeable  or
exercisable for, shares of capital stock or other securities of the Company and,
except  as  set  forth  on  SCHEDULE  3.1(B)(I),  there  are  no  calls,  rights
(including,  without limitation,  preemptive rights),  commitments or agreements
(including, without limitation,  employment, termination and similar agreements)
to which the  Company  or any of its  Subsidiaries  is a party or by which it is
bound, in any case  obligating the Company or any of its  Subsidiaries to issue,
deliver,  sell,  purchase,  redeem or acquire,  any  securities  or other equity
interests or debt  instruments of the Company,  including,  without  limitation,
shares of capital stock or Company Debt, or obligating the Company or any of its
Subsidiaries  to grant,  extend or enter into any such  option,  warrant,  call,
right,  commitment or agreement.  All outstanding shares of capital stock of the
Company are validly issued, fully paid and nonassessable and are not subject to,
and have not been issued in violation of,  preemptive  or other similar  rights.
Set forth on SCHEDULE  2.5 is a list of all  outstanding  options,  warrants and
rights to  purchase  shares of  Company  Common  Stock and the  exercise  prices
relating thereto.

             (ii) VOTING OF SHARES.  Except as set forth in this Agreement or on
SCHEDULE  3.1(B)(II),  there  are  not as of the  date  hereof  any  stockholder
agreements,  voting trusts or other  agreements or  understandings  to which the
Company is a party or by which it is bound  relating to the voting of any shares
of the  capital  stock  of the  Company.  All  registration  rights  agreements,
stockholders'  agreements  and voting  agreements to which the Company or any of
its Subsidiaries is a party are identified on SCHEDULE 3.1(B)(II).

             (iii)  SUBSIDIARIES.  Except as described on SCHEDULE  3.1(B)(III),
all outstanding shares of capital stock of, or other ownership interests in, the
Subsidiaries  of the  Company  are owned by the  Company or a direct or indirect
Subsidiary  of the  Company,  free and  clear  of all  pledges,  liens,  claims,
charges,  security  interests or other  encumbrances of any kind  (collectively,
"Liens").  All such  issued and  outstanding  shares of  capital  stock or other
ownership interests are validly issued, fully paid and nonassessable and no such
shares or other  ownership  interests  have  been  issued  in  violation  of any
preemptive or similar rights.  Except as set forth on SCHEDULE  3.1(B)(III),  no
bonds, debentures, notes or other instruments or evidence of indebt-


                                      A-8
<PAGE>

edness of any  Subsidiary  of the  Company  ("Subsidiary  Debt")  are issued and
outstanding. No shares of capital stock of, or other ownership interests in, any
Subsidiary  of the Company are reserved for issuance.  There are no  outstanding
securities  convertible  into, or  exchangeable  or exercisable  for,  shares of
capital  stock  of, or other  ownership  interests  in,  any  Subsidiary  of the
Company. Except as set forth on SCHEDULE 3.1(B)(III), there are no calls, rights
(including,  without limitation,  preemptive rights),  commitments or agreements
(including, without limitation,  employment, termination and similar agreements)
to which the  Company  or any of its  Subsidiaries  is a party or by which it is
bound, in any case  obligating the Company or any of its  Subsidiaries to issue,
deliver,  sell,  purchase,  redeem or acquire,  any  securities  or other equity
interests or debt  instruments  of any  Subsidiary  of the  Company,  including,
without limitation, shares of capital stock or Subsidiary Debt.

             (c) AUTHORITY; NO VIOLATIONS; CONSENTS AND APPROVALS.

                (i) Subject to the adoption of this Agreement by the holders of
a majority  of the  outstanding  shares of Company  Common  Stock (the  "Company
Stockholder  Approval"),  the  Company  has all  requisite  corporate  power and
authority  to enter  into this  Agreement  and to  consummate  the  transactions
contemplated by this Agreement. The execution and delivery of this Agreement and
the  consummation  of  the  transactions  contemplated  hereby  have  been  duly
authorized by all necessary corporate action on the part of the Company, subject
to the Company Stockholder  Approval.  This Agreement has been duly executed and
delivered by the Company and, subject, to the Company Stockholder Approval,  and
assuming  that this  Agreement  constitutes  the valid and binding  agreement of
Newco,  constitutes a valid and binding obligation of the Company enforceable in
accordance with its terms and conditions except that the enforcement  hereof may
be limited by (A) applicable bankruptcy, insolvency, reorganization, moratorium,
fraudulent  conveyance or other similar laws now or hereafter in effect relating
to creditors' rights generally and (B) general  principles of equity (regardless
of whether enforceability is considered in a proceeding at law or in equity).

             (ii) Except as set forth on SCHEDULE 3.1(C)(II),  the execution and
delivery of this Agreement and the consummation of the transactions contemplated
hereby by the Company will not (A) conflict with, or result in any violation of,
or default  (with or without  notice or lapse of time,  or both) under,  or give
rise to a right of  termination,  cancellation,  modification or acceleration of
any material  obligation  under,  or the creation of a Lien (any such  conflict,
violation,  default,  right  of  termination,  cancellation  ,  acceleration  or
creation, a "Violation"),  of or pursuant to any provision of the certificate of
incorporation  or bylaws (or other  organizational  documents) of the Company or
any of its Subsidiaries or (B) result in any Violation of (1) any loan or credit
agreement,  note, bond,  mortgage,  deed of trust,  indenture,  lease,  Plan (as
defined in Section 3.1(j)),  Company Permit (as defined in Section  3.1(g)),  or
other agreement, obligation, instrument, concession, franchise or license or (2)
any judgment, order, decree, statute, law, ordinance, rule, regulation,  writ or
injunction  (collectively,  "Laws")  applicable  to  the  Company  or any of its
Subsidiaries  or their  respective  properties or assets,  except in the case of
clauses (1) and (2) for any Violations  that,  individually or in the aggregate,
would  not  have a  Material  Adverse  Effect  on the  Company  or  prevent  the
consummation  of any of the  transactions  contemplated  hereby.  The


                                      A-9
<PAGE>

Board of  Directors  of the Company has taken all  actions  necessary  under the
DGCL,  including approving the transactions  contemplated by this Agreement,  to
ensure  that  Section  203 of the DGCL  does  not,  and will  not,  apply to the
transactions contemplated hereby.

             (iii) No consent,  approval,  franchise,  license, waiver, order or
authorization  of,  or  registration,   declaration  or  filing  with,   notice,
exemption,   application  or  certification   to,  or  permit  from  any  court,
administrative   agency  or  commission  or  other  governmental   authority  or
instrumentality,  domestic or foreign (a "Governmental  Entity"), is required by
or with respect to the Company or any of its Subsidiaries in connection with the
execution and delivery of this Agreement by the Company or the  consummation  by
the Company of the transactions  contemplated hereby,  except for (A) the filing
of  a  pre-merger  notification  and  report  form  by  the  Company  under  the
Hart-Scott-Rodino  Antitrust  Improvements  Act of 1976,  as  amended  (the "HSR
Act"),  and the  expiration or  termination  of the  applicable  waiting  period
thereunder,  (B) the filing with the SEC of (1) a proxy  statement in definitive
form for  distribution  to the  stockholders  of the  Company  in advance of the
Stockholders  Meeting in accordance with  Regulation 14A  promulgated  under the
Exchange Act (such proxy statement as amended or supplemented  from time to time
being  hereinafter  referred to as the "Proxy  Statement")  and (2) such reports
under  and  such  other  compliance  with the  Exchange  Act and the  rules  and
regulations  thereunder as may be required in connection with this Agreement and
the  transactions  contemplated  hereby,  (C) the filing of the  Certificate  of
Merger  with the  Secretary  of State of the State of Delaware  and  appropriate
documents  with the  relevant  authorities  of other states in which the Company
does  business,  (D)  such  filings  and  approvals  as may be  required  by any
applicable state takeover,  securities or "blue sky" laws, (E) those filings and
consents as may be  required  under any  environmental,  health or safety law or
regulation  pertaining  to any  notification,  disclosure  or required  approval
necessitated  by the  transactions  contemplated by this Agreement (all of which
filings and  consents  are listed on Schedule  3.1(c)(iii)),  and (F) such other
consents,  approvals,  orders,  authorizations,   registrations,   declarations,
filings,  notices or permits  the  failure of which to be obtained or made would
not have a Material Adverse Effect on the Company or prevent the consummation of
any of the transactions contemplated hereby.

             (d) DISCLOSURE DOCUMENTS. The Company has made available to Newco a
true and complete  copy of each report,  schedule,  registration  statement  and
definitive  proxy  statement filed by the Company with the SEC prior to the date
of this  Agreement  (the "Company SEC  Documents"),  which are all the documents
(other than preliminary material) that the Company was required to file with the
SEC. As of their  respective  dates,  the Company SEC Documents  complied in all
material  respects  with the  requirements  of the  Securities  Act of 1933 (the
"Securities  Act") or the  Exchange  Act,  as the case may be, and the rules and
regulations  of the SEC  promulgated  thereunder,  and none of the  Company  SEC
Documents  contained any untrue statement of a material fact or omitted to state
a  material  fact  required  to be  stated  therein  or  necessary  to make  the
statements  therein,  in light of the circumstances  under which they were made,
not misleading.  The financial statements of the Company included in the Company
SEC  Documents  complied as to form in all material  respects with the published
rules  and  regulations  of the SEC  with  respect  thereto,  were  prepared  in
accordance with generally accepted  accounting  principles ("GAAP") applied on a
consistent  basis during the periods involved (except as may be



                                      A-10
<PAGE>

indicated  in the notes  thereto  or, in the case of  unaudited  statements,  as
permitted by Rule 10-01 of  Regulation  S-X of the SEC) and fairly  present,  in
accordance  with applicable  requirements  of GAAP (subject,  in the case of the
unaudited statements, to year-end audit adjustments, as permitted by Rule 10-01,
and  any  other  adjustments  described  therein),  the  consolidated  financial
position of the Company and its consolidated Subsidiaries as of their respective
dates and the consolidated results of operations and the consolidated cash flows
of the  Company and its  consolidated  Subsidiaries  for the  periods  presented
therein.

             (e) INFORMATION SUPPLIED. None of the information to be supplied by
the Company  specifically  for  inclusion or  incorporation  by reference in the
Proxy  Statement  will,  on the date it is first  mailed to the  holders  of the
Company  Common  Stock  or on the  date  (the  "Meeting  Date")  of the  related
stockholders meeting (the "Stockholders Meeting"),  contain any untrue statement
of a material  fact or omit to state any  material  fact  required  to be stated
therein or necessary in order to make the  statements  therein,  in light of the
circumstances under which they are made, not misleading. If at any time prior to
the Meeting  Date,  any event with  respect to the  Company,  or with respect to
information  supplied by the Company  specifically  for  inclusion  in the Proxy
Statement,  shall occur which is required to be described in an amendment of, or
supplement  to, the Proxy  Statement,  such event shall be so  described  by the
Company.  All documents that the Company is responsible  for filing with the SEC
in connection with the transactions  contemplated herein, to the extent relating
to the Company or its Subsidiaries or other information  supplied by the Company
specifically  for  inclusion  therein,  will comply as to form,  in all material
respects,  with the provisions of the Exchange Act and the rules and regulations
thereunder,  and each such document  required to be filed with any  Governmental
Entity  other  than  the SEC  will  comply  in all  material  respects  with the
provisions  of  applicable  Law as to the  information  required to be contained
therein.  Notwithstanding the foregoing,  the Company makes no representation or
warranty with respect to (i) the information supplied or to be supplied by Newco
for inclusion in the Proxy  Statement or (ii) any  projections,  forward-looking
statements  or  similar  information  provided  to  Newco  that  are  not  of an
historical  nature,  except that,  in the case of clause  (ii),  the Company has
prepared such projections or statements in good faith based upon assumptions the
Company believed to be reasonable in light of the circumstances  existing at the
time such projections were made.

             (f) NO  DEFAULT.  Except (i) as may result from the  execution  and
delivery of this Agreement and the consummation of the transactions contemplated
hereby,  as set forth on SCHEDULE  3.1(C)(II),  or (ii) as set forth on SCHEDULE
3.1(F), no Violation exists (and no event has occurred which, with notice or the
lapse of time or both, would  constitute a Violation) of any term,  condition or
provision  of  (A)  the  certificate  of   incorporation  or  bylaws  (or  other
organizational  documents)  of the Company or any of its  Subsidiaries,  (B) any
loan or  credit  agreement,  note,  bond,  mortgage,  indenture,  lease or other
agreement,  obligation or commitment  (collectively,  "Contracts"),  instrument,
permit,  concession,  franchise  or license  to which the  Company or any of its
Subsidiaries  is now a party or by which the Company or any of its  Subsidiaries
or any of  their  respective  properties  or  assets  is  bound  or (C)  any Law
applicable to the Company or any of its Subsidiaries, except in the case of (A),
(B) and (C) for Violations  which,  in the aggregate,  would not have a Material
Adverse  Effect  on  the  Company  or  prevent  the  consummation  of any

                                      A-11
<PAGE>

of the transactions contemplated hereby.

             (g)  COMPLIANCE   WITH   APPLICABLE   LAWS.  The  Company  and  its
Subsidiaries  hold  all  permits,  licenses,  variances,   exemptions,   orders,
franchises and approvals of all Governmental  Entities  necessary for the lawful
conduct  of their  respective  businesses  (the  "Company  Permits")  and are in
compliance  with the terms  thereof,  except  where the failure to hold any such
Company  Permits  or to be in  compliance  would  not,  individually  or in  the
aggregate,  have a  Material  Adverse  Effect  on the  Company  or  prevent  the
consummation of any of the transactions  contemplated hereby. The conduct by the
Company  and  its  Subsidiaries  of  their  respective  businesses  has  been in
compliance  with all applicable  Laws,  with such  exceptions as would not have,
individually or in the aggregate,  a Material Adverse Effect on the Company.  As
of the date of this Agreement,  no  investigation  or review by any Governmental
Entity with respect to the Company or any of its  Subsidiaries is pending or, to
the knowledge of the Company, has been threatened which would have, individually
or in the  aggregate,  a Material  Adverse  Effect on the Company or prevent the
consummation of any of the transactions contemplated hereby.

             (h) LITIGATION. Except as set forth on SCHEDULE 3.1(H) or disclosed
in the Company SEC Documents, as of the date hereof and at and as of the Closing
Date, there is no claim, suit, action or proceeding pending or, to the knowledge
of the Company,  threatened against the Company or any Subsidiary of the Company
("Company  Litigation")  the loss of which  would have,  individually  or in the
aggregate,  a Material Adverse Effect on the Company,  nor is there any material
judgment,  decree,  unfunded  settlement,  award,  temporary  restraining order,
injunction,  rule or order of any Governmental Entity or arbitrator  outstanding
against the Company or any  Subsidiary  of the Company  ("Company  Order")  that
would have,  individually or in the aggregate,  a Material Adverse Effect on the
Company.

             (i)  TAXES.

                  (i) Each of the  Company, its Subsidiaries and any affiliated,
combined or unitary group of which any such  corporation  is or was a member (A)
has duly filed all  material  tax  returns,  reports,  declarations,  estimates,
information  returns and statements ("Tax Returns")  required to be filed by it,
or requests for  extensions  to file such Tax Returns have been timely filed and
granted  and have not  expired,  and such Tax  Returns  are  true,  correct  and
complete in all material respects; (B) has duly paid in full (or the Company has
paid on its  behalf) or made  adequate  provision  in the  Company's  accounting
records for all taxes for all past and current  periods for which the Company or
any of its Subsidiaries is liable; and (C) has complied in all material respects
with all applicable  laws,  rules,  and regulations  relating to the payment and
withholding  of taxes and has in all  material  respects  timely  withheld  from
employee wages and paid over to the proper governmental  authorities all amounts
required to be so withheld and paid over. The most recent  financial  statements
contained in the Company SEC Documents  reflect adequate  reserves for all taxes
payable by the Company and its Subsidiaries for all taxable periods and portions
thereof accrued through the date of such financial  statements.  SCHEDULE 3.1(I)
sets forth the last taxable  period through which the federal income tax returns
of the Company and any of its  Subsidiaries  have been  examined by the Internal
Revenue Service or otherwise  closed.  All deficiencies  asserted as


                                      A-12
<PAGE>

a result of such examinations and any examination by any applicable state, local
or  foreign  taxing  authority  which have not been or will not be  appealed  or
contested  in a timely  manner  have been  paid,  fully  settled  or  adequately
provided for in the most recent  financial  statements  contained in the Company
SEC Documents.  Except as set forth on SCHEDULE 3.1(I), no federal, state, local
or foreign tax audits or other  administrative  proceedings or court proceedings
are currently pending with regard to any federal,  state, local or foreign taxes
for  which  the  Company  or any of its  Subsidiaries  would be  liable,  and no
deficiencies for any such taxes have been proposed,  asserted or assessed, or to
the best knowledge of the Company or any of its Subsidiaries, threatened against
the  Company or any of its  Subsidiaries  pursuant  to such  examination  of the
Company or any of its  Subsidiaries  by such  federal,  state,  local or foreign
taxing  authority  with  respect to any period.  Except as set forth on SCHEDULE
3.1(I),  no  requests  for  waivers of the time to assess any taxes  against the
Company or any of its Subsidiaries  have been granted or are pending and neither
the Company nor any of its  Subsidiaries  has executed (or will execute prior to
the Effective Time) any closing agreement  pursuant to Section 7121 of the Code,
or any predecessor provision thereof or any similar provision of state, local or
foreign  income tax law that relates to the assets or  operations of the Company
or any of its Subsidiaries. Neither the Company nor any of its Subsidiaries is a
party to any agreement  providing for the allocation or sharing of liability for
any taxes.  The Company has made available to Newco complete and accurate copies
of all income and franchise Tax Returns and all other material Tax Returns filed
by or on behalf of the Company or any of its  Subsidiaries for the taxable years
ending on or prior to December 31, 1997. Except as set forth on SCHEDULE 3.1(I),
neither the Company nor any of its Subsidiaries has made any payments subject to
Section 280G of the Code,  or is obligated to make any such  payments  that will
not be deductible under Section 280G of the Code, or is a party to any agreement
that under  certain  circumstances  could  obligate it to make any payments that
will not be deductible  under Section 280G of the Code.  Neither the Company nor
any of  its  Subsidiaries  has  been  a  United  States  real  property  holding
corporation  within  the  meaning of Section  897(c)(2)  of the Code  during the
applicable period specified in Section  897(c)(1)(A)(ii) of the Code. As used in
this Agreement the term "taxes" includes all federal,  state,  local and foreign
or other taxing authority income,  franchise,  property, sales, use, ad valorem,
payroll,  social  security,  unemployment,  assets,  value  added,  withholding,
excise, severance, transfer, employment, alternative or add-on minimum and other
taxes, charges,  fees, levies,  imports,  duties,  licenses or other assessments
including without limitation obligations for withholding taxes from payments due
or made to any other person, together with any interest, penalties or additional
amounts imposed by any taxing authority or additions to tax.

             (j) PENSION AND BENEFIT PLANS; ERISA.

                (i) For purposes of this Agreement, the term "Plan" shall refer
to any of the following  maintained by the Company,  any of its  Subsidiaries or
any of their respective ERISA Affiliates (as defined below),  or with respect to
which the Company,  any of its  Subsidiaries  or any of their  respective  ERISA
Affiliates  contributes or has any obligation to contribute or has any liability
(including,  without limitation,  a liability arising out of an indemnification,
guarantee, hold harmless or similar agreement): any plan, program,  arrangement,
agreement  or  commitment,  whether  written  or oral,  which is an  employment,
consulting,   deferred  compensation  or  change-in-control   agreement,  or  an
executive  compensation,  incentive  bonus or  other  bonus,  employee



                                      A-13
<PAGE>

pension,  profit-sharing,  savings,  retirement,  stock option,  stock purchase,
severance pay, change-in-control, life, health, disability or accident insurance
plan,  or other  employee  benefit  plan,  program,  arrangement,  agreement  or
commitment,   whether  written  or  oral,  including,  without  limitation,  any
"employee  benefit  plan" as defined in Section 3(3) of the Employee  Retirement
Income Security Act of 1974, as amended ("ERISA"). SCHEDULE 3.1(J)(I) sets forth
each  employment  agreement  with a person who is  entitled  to receive at least
$100,000  per year  from the  Company  or any of its  Subsidiaries  (other  than
employment  agreements  terminable  without  material  liability  (not otherwise
disclosed) on not more than sixty (60) days' notice).

                     (ii) SCHEDULE 3.1(J)(II)  identifies each "employee benefit
plan" as defined in Section 3(3) of ERISA

that the Company,  its  Subsidiaries or any of their respective ERISA Affiliates
maintains or contributes  to. None of the Company,  its  Subsidiaries  or any of
their  respective  ERISA  Affiliates has maintained or contributed to any of the
following  during  the  three  years  immediately  preceding  the  date  of this
Agreement:

                           (A) a defined  benefit  plan  subject  to  Title  IV
of ERISA;

                           (B) a "Multiemployer plan" as defined in Section 4001
 of ERISA;

                           or

                           (C) a  "Multiple  Employer  Plan"  as  that  term  is
defined in Section 413(a) of the Code.

                     (iii)  No  event  has   occurred   and  no   condition   or
circumstance currently exists, in connection with

which the Company, any of its Subsidiaries, their respective ERISA Affiliates or
any Plan, directly or indirectly, could be subject to any liability under ERISA,
the Code or any other  Law  applicable  to any Plan  which  would be  reasonably
likely to have a Material Adverse Effect on the Company.

                     (iv) With respect to each Plan,  (A) all material  payments
due from the Company or any of its  Subsidiaries  to date have been made and all
material amounts that should be accrued (in accordance with GAAP) as liabilities
of the  Company  or any of its  Subsidiaries  which have not been paid have been
properly  recorded on the books of the  Company,  (B) each such Plan which is an
"employee  pension  benefit  plan" (as  defined  in  Section  3(2) of ERISA) and
intended  to  qualify  under  Section  401 of the Code  has  either  received  a
favorable determination letter from the Internal Revenue Service with respect to
such qualifications as of the date specified in SCHEDULE 3.1(J)(IV) or has filed
for such a  determination  letter with the Internal  Revenue  Service within the
time permitted under Rev. Proc.  95-12  (December 29, 1994),  1995-3 IRB 24, and
nothing has occurred since the date of such letter that has resulted in or could
reasonably be expected to result in a tax qualification  defect which would have
a Material Adverse Effect on the Company, and (C) there are no material actions,
suits or claims  pending  (other than routine  claims for  benefits)  or, to the
Company's knowledge,  threatened with respect to such Plan or against the


                                      A-14
<PAGE>

assets of such Plan.

             (v) Except as disclosed in SCHEDULE  3.1(J)(V),  each Plan has been
operated and  administered  in accordance  with its terms and in compliance with
applicable ERISA provisions and the Code,  except where any such  non-compliance
could not  reasonably  be  expected  to have a  Material  Adverse  Effect on the
Company.

             (vi)  Neither the Company nor any of its ERISA  Affiliates,  nor to
the  knowledge  of  the  Company  or  any of its  ERISA  Affiliates,  any  other
"disqualified  person" or "party in interest" (as defined in Section 4975 of the
Code and  Section  3(14) of  ERISA,  respectively)  with  respect  to a Plan has
breached the  fiduciary  rules of ERISA or engaged in a  prohibited  transaction
which could subject the Company or any of its Subsidiaries to any tax or penalty
imposed under Section 4975 of the Code or Section 502(i),  (j), or (l) of ERISA,
where any such breach,  tax or penalty  could  reasonably  be expected to have a
Material Adverse Effect on the Company.

             (vii) All reporting and disclosure  obligations imposed under ERISA
and the Code have been  satisfied  with  respect to each Plan,  except where any
failure to satisfy such  obligations  could not reasonably be expected to have a
Material Adverse Effect on the Company.

             (viii)  Each  Plan  which is  subject  to the  requirements  of the
Consolidated Omnibus Budget  Reconciliation Act of 1985 ("COBRA") and the Health
Insurance  Portability and  Accountability  Act ("HIPAA") has been maintained in
compliance with COBRA and HIPAA,  including all notice requirements,  and no tax
payable on account of Section 4980B or any other section of the Code has been or
is expected  to be  incurred  with  respect to any Plan,  except  where any such
noncompliance or tax could not reasonably be expected to have a Material Adverse
Effect on the Company.

             (ix) The Company has made available to Newco,  with respect to each
Plan for which the following exists:

                          (A) a  copy  of  the  most  recent  annual  report  on
Form 5500, with respect to such Plan including any Schedule B thereto;

                          (B) the  most  recent  determination  letter  from the
Internal Revenue Service, if any;

                          (C) a copy of  the  Summary Plan Description, together
          with each Summary of Material  Modifications with respect to such Plan
          and,  unless the Plan is embodied  entirely in an insurance  policy to
          which the Company or any of its  Subsidiaries  is a party,  a true and
          complete copy of such Plan; and

                           (D) if  the  Plan  is  funded  through a trust or any
          third party funding vehicle (other than an insurance  policy),  a copy
          of the  trust or other  funding  agreement  and the  latest  financial
          statements thereof.

                                      A-15
<PAGE>


             (x) Except as disclosed in the Company SEC Documents or as required
by this  Agreement,  neither  the Company  nor any of its  Subsidiaries  has any
announced plan or legally binding  commitment to create any additional  material
Plans or to make any material  amendment or  modification  to any existing Plan,
except as required by law or as necessary to maintain tax-qualified status.

             (xi) The  Company  and its ERISA  Affiliates  have  complied in all
respects with all Laws  relating to the hiring and  retention of all  employees,
leased employees and independent  contractors  relating to wages,  hours, Plans,
equal opportunity,  collective bargaining and the payment of social security and
other taxes, except where such noncompliance could not reasonably be expected to
have a Material Adverse Effect on the Company.

             (xii) Notwithstanding  anything else set forth herein,  neither the
Company nor any  Subsidiary  of the  Company has  incurred  any  liability  with
respect to any Plan under ERISA (including, without limitation, Title I or Title
IV of  ERISA),  the Code or  other  applicable  Law  (other  than the  liability
attributable  to the provision of benefits under the Plans),  which has not been
satisfied in full,  and no event has occurred,  and there exists no condition or
set of circumstances which could result in the imposition of any liability under
ERISA (including, without limitation, Title I or Title IV of ERISA), the Code or
other  applicable Law with respect to any of the Plans,  which liability  would,
individually or in the aggregate, have a Material Adverse Effect on the Company.

             (xiii) Except as disclosed in SCHEDULE 3.1(J)(XIII), no Plan, other
than a Plan which is an employee  pension  benefit  plan  (within the meaning of
Section  3(2)(A)  of  ERISA),  provides  material  benefits,  including  without
limitation  death,  health or medical  benefits  (whether or not insured),  with
respect to current or former  employees of the Company or any  Subsidiary of the
Company beyond their retirement or other termination of service with the Company
or such  Subsidiary  (other than (A) coverage  mandated by  applicable  law, (B)
deferred  compensation  benefits properly accrued as liabilities on the books of
the  Company,  or (C) benefits the full cost of which is borne by the current or
former employee (or his beneficiary)).

             (xiv) Except as set forth on SCHEDULE 3.1(J)(XIV), the consummation
of the  transactions  contemplated  by this  Agreement  will not (A) entitle any
current  or former  employee  or officer of the  Company  or any  Subsidiary  to
material severance pay,  unemployment  compensation or any other payment, or (B)
accelerate the time of payment or vesting,  or materially increase the amount of
compensation due any such employee or officer.

             (xv) For purposes of this Section 3.1(j),  ERISA Affiliates include
each corporation that is a member of the same controlled group as the Company or
any of its  Subsidiaries  within the meaning of Section  414(b) of the Code, any
trade or business,  whether or not  incorporated,  under common control with the
Company or any of its  Subsidiaries  within the meaning of Section 414(c) of the
Code and any member of an  affiliated  service  group that includes the Company,
any  of  its  Subsidiaries  and  any of the  corporations,  trades  or  business
described above, within the meaning of Section 414(m) of the Code.

                                      A-16
<PAGE>

             (k) ABSENCE OF CERTAIN CHANGES OR EVENTS.  Since September 30, 1998
and except as disclosed  in SCHEDULE  3.1(K) or the Company SEC  Documents,  (i)
each of the Company and its  Subsidiaries  has conducted  its  business,  in all
material  respects,  only in the ordinary course and in a manner consistent with
past  practice  (except in  connection  with the  negotiation  and execution and
delivery of this  Agreement),  (ii) no event has  occurred  that would have been
prohibited  by the terms of Section  4.2 had the terms of such  Section  been in
effect as of and at all times since September 30, 1998,  (iii) there has been no
material  change  by  the  Company  in its  accounting  methods,  principles  or
practices  and (iv) other than any event  relating to the economy or  securities
markets  in  general,  there has not been any event or  events  (whether  or not
covered by insurance),  individually or in the aggregate,  having, or that would
be reasonably expected to have, a Material Adverse Effect on the Company.

             (l) NO UNDISCLOSED MATERIAL  LIABILITIES.  There are no liabilities
of the  Company  or any of its  Subsidiaries  of any  kind  whatsoever,  whether
accrued, contingent, absolute, determined, determinable or otherwise, that could
reasonably be expected to have,  individually  or in the  aggregate,  a Material
Adverse  Effect on the  Company,  other than (i)  liabilities  reflected  in the
Company's financial  statements  (together with the related notes thereto) filed
with the Company's quarterly report on Form 10-Q for the quarter ended September
30, 1998, (ii)  liabilities  under this Agreement or for  professional  fees and
expenses  in  connection  with the  transactions  contemplated  hereby and (iii)
liabilities  that  have  occurred  in the  ordinary  course  of  business  since
September 30, 1998.

             (m) OPINION OF  FINANCIAL  ADVISOR.  The Board of  Directors of the
Company has received the opinion of BT Alex. Brown  Incorporated (the "Financial
Advisor")  dated March 2, 1999 to the effect that,  as of such date,  the Merger
Consideration  to be  received  by the  holders of Company  Common  Stock in the
Merger (other than Welsh,  Carson,  Anderson & Stowe VIII, L.P.  ("WCAS") or its
affiliates)  is fair from a financial  point of view to such  holders,  and such
opinion has not been  withdrawn or materially and adversely  modified.  True and
complete copies of all agreements and understandings between the Company and the
Financial  Advisor relating to the  transactions  contemplated by this Agreement
have been provided by the Company to Newco.

             (n)  VOTE  REQUIRED.  The  affirmative  vote  of the  holders  of a
majority of the  outstanding  shares of Company Common Stock is the only vote of
the  holders of any class or series of the  Company's  capital  stock  necessary
(under applicable Law or otherwise) to adopt this Agreement.

             (o) ENVIRONMENTAL  MATTERS.  Except as set forth in the Company SEC
Documents, (i) the assets, properties,  businesses and operations of the Company
and its  Subsidiaries are in compliance with applicable  Environmental  Laws (as
defined herein),  except for such non-compliance  which has not had and will not
have,  individually  or in the  aggregate,  a  Material  Adverse  Effect  on the
Company,  (ii) the Company and its Subsidiaries  have obtained and, as currently
operating,  are in  compliance  with all  Company  Permits  necessary  under any
Environmental  Law for the conduct of the business and operations of the Company
and its Subsidiaries in the manner now conducted except for such  non-compliance
which  has not had and  will  not  have,  individually  or in the  aggregate,  a
Material Adverse Effect on the Company, and (iii) neither the Company nor any of

                                      A-17
<PAGE>

its Subsidiaries nor any of their respective assets,  properties,  businesses or
operations  has  received  or is  subject  to  any  outstanding  order,  decree,
judgment, complaint, agreement, claim, citation, notice or proceeding indicating
that the Company or any of its  Subsidiaries is or may be liable for a violation
of any  Environmental  Law which  liability  would have,  individually or in the
aggregate, a Material Adverse Effect on the Company nor, to the knowledge of the
Company,  has any such order,  decree,  judgment,  complaint,  claim,  citation,
notice  or  proceeding  been  threatened.  As used in this  Agreement,  the term
"Environmental  Law"  means any law,  regulation,  decree,  judgment,  permit or
authorization  relating  to works or public  safety and the  indoor and  outdoor
environment, including, without limitation, pollution, contamination,  clean-up,
regulation  and  protection of the air,  water or soils in the indoor or outdoor
environment.

             (p) BOARD RECOMMENDATION. The Board of Directors of the Company, at
a meeting duly called and held,  has by the  unanimous  vote of those  directors
present (i)  determined  that this Agreement and the  transactions  contemplated
hereby,  including  the  Merger,  are  advisable  and  fair  to and in the  best
interests of the  stockholders of the Company and has approved the same and (ii)
resolved to recommend,  subject to their fiduciary  duties under  applicable Law
and Sections 5.2 and 5.11(b),  that the holders of the shares of Company  Common
Stock approve and adopt this Agreement.

             (q) INTELLECTUAL PROPERTY.  Except as set forth on SCHEDULE 3.1(Q),
each of the Company and its  Subsidiaries  owns or has a valid right to use each
trademark,  trade name, patent,  service mark, brand mark, brand name,  computer
program,  database,  industrial design and copyright required,  owned or used in
connection  with the operation of its  businesses,  including any  registrations
thereof and pending  applications  therefor,  and each license or other contract
relating thereto that is material to the conduct of its business  (collectively,
the "Company Intellectual Property"),  except where the failure to own or have a
right to use such property would not have,  individually or in the aggregate,  a
Material  Adverse  Effect on the  Company.  All  material  Company  Intellectual
Property  is set forth on  SCHEDULE  3.1(Q).  Except  as set  forth on  SCHEDULE
3.1(Q),  the use of the  Company  Intellectual  Property  by the  Company or its
Subsidiaries does not conflict with, infringe upon, violate or interfere with or
constitute  an  appropriation  of  any  right,  title,   interest  or  goodwill,
including, without limitation, any intellectual property right, trademark, trade
name, patent, service mark, brand mark, brand name, computer program,  database,
industrial design,  copyright or any pending  application  therefor of any other
Person.  Except  as set  forth  on  SCHEDULE  3.1(Q),  the  use  of all  Company
Intellectual  Property  will  not be  adversely  affected  by  the  transactions
contemplated in this Agreement.  The Company is taking reasonable precautions to
prevent disclosure of any confidential Company Intellectual Property.

             (r)  INSURANCE.  The  Company and its  Subsidiaries  are covered by
valid and currently  effective insurance policies issued in favor of the Company
that are  customary in all material  respects for  companies of similar size and
financial condition in the Company's  industry.  Except as set forth on SCHEDULE
3.1(R), all such policies are in full force and effect, all premiums due thereon
have  been  paid  and the  Company  has  complied  with the  provisions  of such
policies,  except  where  such  failure  to be in full  force and  effect,  such
nonpayment  or  such  noncompliance  would  not  have,  individually  or in  the
aggregate,  a Material  Adverse  Effect on the  Company.


                                      A-18
<PAGE>

Except as set forth on SCHEDULE 3.1(R),  the Company has not been advised of any
defense to coverage in connection  with any material claim to coverage  asserted
or  noticed  by the  Company  under  or in  connection  with  any of its  extant
insurance  policies.  The Company has not received any written notice from or on
behalf of any  insurance  carrier  issuing  policies  or binders  relating to or
covering the Company and its  Subsidiaries  that there will be a cancellation or
non-renewal of existing policies or binders.

             (s) LABOR MATTERS.  Neither the Company nor any of its Subsidiaries
is a party to, or is bound by, any collective bargaining agreement,  contract or
other agreement or understanding with a labor union or labor  organization,  nor
is the Company or any of its Subsidiaries the subject of a proceeding  asserting
that it or any such  Subsidiary has committed an unfair labor  practice  (within
the meaning of the National Labor Relations Act) or seeking to compel it or such
Subsidiaries  to bargain with any labor  organization as to wages and conditions
of employment.  There is (i) no strike or material  labor  dispute,  slowdown or
stoppage  pending or, to the  knowledge of the Company,  threatened  against the
Company  or any of its  ERISA  Affiliates  and  (iii)  to the  knowledge  of the
Company, no union representation question existing with respect to the employees
of the Company or its ERISA Affiliates.

             (t) CONTRACTS.  Except as set forth on SCHEDULE 3.1(K), neither the
Company nor any of its  Subsidiaries  is a party to any Contract  required to be
described  in or filed as an exhibit to any  Company  SEC  Document  that is not
described in or filed as required by the  Securities Act or the Exchange Act, as
the case may be. Except as set forth on SCHEDULE 3.1(K),  and except for matters
that would not, individually or in the aggregate, have a Material Adverse Effect
on the Company,  (i) neither the Company nor any of its Subsidiaries is (with or
without the lapse of time or the giving of notice, or both) in breach or default
in any  material  respect  under  any  Contract,  (ii) to the  knowledge  of the
Company, none of the other parties to any Contract is (with or without the lapse
of time or the giving of notice,  or both) in breach or default in any  material
respect  under  any  Contract  and  (iii)  neither  the  Company  nor any of its
Subsidiaries  has received any written  notice of the  intention of any party to
terminate any Contract  whether as a termination  for convenience or for default
of the Company or any of its Subsidiaries thereunder.

             (u) AFFILIATED TRANSACTIONS. Except as set forth on SCHEDULE 3.1(U)
or in the Company SEC Documents, no executive officer or director of the Company
(or, to the Company's knowledge, any spouse of any such individual or any entity
in which such individual owns a material beneficial  interest) is a party to any
agreement,  contract,  commitment,  transaction or understanding with or binding
upon the Company or any of its Subsidiaries or any of their respective assets or
has any material  interest in any material  property owned by the Company or its
Subsidiaries or has engaged in any transaction  with any of the foregoing within
the last twelve months.

             (v) RIGHTS  AGREEMENT  AMENDMENT.  The Company has entered  into an
amendment to the Rights Agreement (the "Rights Agreement Amendment") pursuant to
which (i) the Rights  Agreement  and the Rights  will not be  applicable  to the
Merger,  (ii) the execution of this Agreement and the consummation of the Merger
shall not result in a  "Distribution  Date"  under


                                      A-19
<PAGE>

the Rights Agreement, (iii) consummation of the Merger shall not result in Newco
or its affiliates  being an "Acquiring  Person,"  result in the occurrence of an
event described in Section 14 of the Rights Agreement or otherwise result in the
ability of any Person to exercise any material rights under the Rights Agreement
or enable or require  the Rights to separate  from the shares of Company  Common
Stock to which they are  attached  and (iv) the  Rights  Agreement  will  expire
immediately prior to the Effective Time.

         3.2 REPRESENTATIONS  AND  WARRANTIES OF NEWCO.  Newco  represents  and
warrants  to the  Company as of the date  hereof (or such other date as shall be
expressly specified) as follows:

             (a) ORGANIZATION,  STANDING AND POWER.  Newco is a corporation duly
organized,  validly existing and in good standing under the laws of the State of
Delaware and has all requisite  corporate  power and authority to own, lease and
operate its properties and to carry on its business as now being conducted,  and
is duly qualified to do business as a foreign  corporation  and in good standing
to conduct business in each jurisdiction in which the business it is conducting,
or  the  operation,   ownership  or  leasing  of  its  properties,   makes  such
qualification  necessary,  other than in such jurisdictions where the failure so
to qualify would not have a Material Adverse Effect with respect to Newco. Newco
has heretofore made available to the Company  complete and correct copies of its
certificate of incorporation and bylaws.

             (b) CAPITAL STRUCTURE.  As of the date of this Amended and Restated
Agreement,  the authorized  capital stock of Newco  consists of (i)  100,000,000
shares of Newco Common Stock,  ten shares of which have been validly  issued and
are fully paid, nonassessable and owned of record and beneficially by WCAS, free
and clear of any Lien, (ii) 20,000,000 shares of preferred stock, par value $.01
per share ("Newco  Preferred Stock") and (iii) 5,000,000 shares of Newco Class A
Common Stock.  No shares of Newco  Preferred Stock or Newco Class A Common Stock
are issued and outstanding.

             (c) AUTHORITY; NO VIOLATIONS; CONSENTS AND APPROVALS.

                 (i) Newco has all requisite corporate power and authority to
enter  into this  Agreement  and to  consummate  the  transactions  contemplated
hereby.  The  execution  and delivery of this  Agreement by Newco have been duly
authorized  by all  necessary  corporate  action  on the  part  of  Newco.  This
Agreement has been duly executed and delivered by Newco and,  assuming that such
constitutes  the valid and binding  agreement  of the Company,  constitutes  the
valid and binding  obligation of Newco  enforceable in accordance with its terms
and  conditions  except  that  the  enforcement  hereof  may be  limited  by (A)
applicable  bankruptcy,  insolvency,   reorganization,   moratorium,  fraudulent
conveyance  or other  similar  laws  now or  hereafter  in  effect  relating  to
creditors' rights generally and (B) general  principles of equity (regardless of
whether enforceability is considered in a proceeding at law or in equity).

                 (ii) The  execution and delivery of  this   Agreement  and  the
consummation  of the  transactions  contemplated  hereby  by Newco  will not (A)
result in any Violation of any provision of the certificate of  incorporation or
bylaws  of Newco  or (B)  result  in any  Violation  of (1) any  loan

                                      A-20
<PAGE>

or credit  agreement,  note,  mortgage,  indenture,  lease, or other  agreement,
obligation,  instrument,  concession,  franchise  or  license  or  (2)  any  Law
applicable to Newco or its  properties or assets,  except in the case of clauses
(1) and (2), for any Violations  that,  individually or in the aggregate,  would
not have a Material  Adverse Effect on Newco or prevent the  consummation of any
of the transactions contemplated hereby.

                 (iii) No consent,  approval,  order  or  authorization  of,  or
registration,  declaration  or  filing  with,  notice  to,  or  permit  from any
Governmental  Entity is required by or with respect to Newco in connection  with
its execution and delivery of this Agreement or the consummation by Newco of the
transactions  contemplated hereby, except for (A) filings under the HSR Act, (B)
the filing with the SEC of such reports under and such other compliance with the
Exchange  Act and the rules and  regulations  thereunder  as may be  required in
connection with this Agreement and the transactions contemplated hereby, (C) the
filing of the  Certificate of Merger with the Secretary of State of the State of
Delaware and (D) such filings and approvals as may be required by any applicable
state securities, "blue sky" or takeover laws.

             (d) INFORMATION SUPPLIED. None of the information to be supplied by
Newco  specifically  for  inclusion or  incorporation  by reference in the Proxy
Statement  will, on the date it is first mailed to the holders of Company Common
Stock or at the Meeting Date, contain any untrue statement of a material fact or
omit to state any material  fact  required to be stated  therein or necessary in
order to make the statements  therein, in light of the circumstances under which
they are made,  not  misleading.  If at any time prior to the Meeting Date,  any
event with respect to Newco,  or with respect to  information  supplied by Newco
specifically for inclusion in the Proxy Statement, shall occur which is required
to be described in an amendment of, or supplement to, the Proxy Statement,  such
event shall be so described by Newco and provided to the Company.  All documents
that  Newco  is  responsible  for  filing  with the SEC in  connection  with the
transactions  contemplated  herein  will  comply  as to  form,  in all  material
respects,  with the provisions of the Exchange Act and the rules and regulations
thereunder,  and each such document  required to be filed with any  Governmental
Entity  other  than  the SEC  will  comply  in all  material  respects  with the
provisions  of  applicable  Law as to the  information  required to be contained
therein.  Notwithstanding  the  foregoing,  Newco  makes  no  representation  or
warranty  with  respect to the  information  supplied  or to be  supplied by the
Company for inclusion in the Proxy Statement.

             (e)  BOARD  RECOMMENDATION.  The  Board of  Directors  of Newco has
determined by unanimous written consent that this Agreement and the transactions
contemplated hereby,  including the Merger, are advisable and fair to and in the
respective  best  interests of Newco and has approved the same.  WCAS,  the sole
stockholder of Newco, has approved and adopted this Agreement.

             (f)   FRAUDULENT   CONVEYANCE.   Assuming   the   accuracy  of  the
representations and warranties of the Company set forth in this Agreement, Newco
has no  reason  to  believe  that  the  financing  to be  provided  to  Newco to
effectuate  the Merger will cause (i) the fair  salable  value of the  Surviving
Corporation's  assets to be less than the total  amount that will be required to
pay its existing liabilities (including known contingent liabilities),  (ii) the
Surviving Corporation not to


                                      A-21
<PAGE>

be able to pay its existing liabilities (including known contingent liabilities)
as they mature, or (iii) the Surviving Corporation to have an unreasonably small
amount of capital with which to engage in its business activities.

             (g) INTERIM  OPERATIONS OF NEWCO. Newco was formed on March 1, 1999
solely for the  purpose of  engaging in the  transactions  contemplated  hereby.
Newco  has  engaged  in no  other  business  activities  and has  conducted  its
operations  only  as  contemplated   hereby.   Except  for  (i)  obligations  or
liabilities  incurred in connection with its  incorporation  or organization and
the transactions  contemplated by this Agreement and (ii) this Agreement and any
other   agreements  or  arrangements   contemplated  by  this  Agreement  or  in
furtherance of the  transactions  contemplated  hereby,  Newco has not incurred,
directly or indirectly,  through any subsidiary or affiliate, any obligations or
liabilities or engaged in any business activities of any type or kind whatsoever
or entered into any agreements or arrangements with any Person.

             (h) FINANCING. Newco has provided a binding commitment, in the form
of a bid letter from WCAS to the Company  dated  February  26, 1999 (the "Equity
and Bridge  Commitment"),  and has received binding written  commitments,  dated
February 26, 1999,  addressed to WCAS,  from Chase  Securities,  Inc., The Chase
Manhattan Bank, DLJ Capital Funding,  Inc., Credit Suisse First Boston and Fleet
National Bank (the "Debt  Commitments"),  and "highly  confident"  letters dated
February 24, 1999, from Donaldson,  Lufkin & Jenrette Securities Corporation and
Chase Securities,  Inc. (the "Highly Confident Letters"). Chase Capital Partners
and WCAS have provided  binding  commitments  in the form of commitment  letters
dated  February 24, 1999 and March 1, 1999,  respectively,  to purchase from the
Company  pay-in-kind  senior  unsecured  notes of the Company and Company Common
Stock (the "PIK  Investment  Letters").  WCAS  Capital  Partners  III,  L.P. has
provided binding commitment to provide certain bridge financing,  in the form of
a  commitment  letter dated  February  26,  1999,  from WCAS to the Company (the
"Bridge  Commitment").  Ferrer Freeman  Thompson & Co., on behalf of Health Care
Capital Partners L.P. and Health Care Executive  Partners L.L.P.  (collectively,
"HCCP") has executed a subscription  agreement with Newco pursuant to which HCCP
has agreed to  contribute  to the equity  capital  of Newco  (together  with the
Equity and Bridge Commitment, the Debt Commitments, the Highly Confident Letters
and  the PIK  Investment  Letters  and the  Bridge  Commitment,  the  "Financing
Commitments").  True and correct copies of the Financing  Commitments  have been
furnished to the Company. The Financing Commitments have been obtained,  subject
to the terms  and  conditions  of the  Financing  Commitments,  to  provide  the
financing necessary to pay the Merger  Consideration  pursuant to the Merger, to
pay (or provide the funds for the  Company to pay) all amounts  contemplated  by
Section 5.10 when due, to refinance any  indebtedness or other obligation of the
Company and its Subsidiaries  which may become due as a result of this Agreement
or any of the transactions  contemplated hereby, and to pay all related fees and
expenses  (the  financing  necessary  to  provide  such  funds  pursuant  to the
Financing  Commitments being hereinafter referred to as the "Financing"),  which
Financing  Commitments  are in full  force  and  effect  as of the  date of this
Amended and Restated Agreement.  It is the good faith belief of Newco, as of the
date  of this  Amended  and  Restated  Agreement,  that  the  Financing  will be
obtained,  and Newco  shall use  commercially  reasonable  efforts to obtain the
Financing,  including using commercially  reasonable efforts to fulfill or cause
the  fulfillment  of any of the  conditions  thereto.  If the

                                      A-22
<PAGE>
Financing is not available,  Newco shall use commercially  reasonable efforts to
obtain other financing (on terms no more burdensome in any material respect than
those set forth in the Financing  Commitments)  to consummate  the  transactions
contemplated hereby.

             (i)  LITIGATION.  As of the date hereof,  there is no claim,  suit,
action or proceeding  pending or, to the knowledge of Newco,  threatened against
Newco or any of its  affiliates  nor is there  any  material  judgment,  decree,
unfunded settlement,  award,  temporary restraining order,  injunction,  rule or
order of any Governmental Entity or arbitrator  outstanding against Newco or any
of its affiliates that would have a Material  Adverse Effect on Newco or prevent
the consummation of any of the transactions contemplated by this Agreement.

             (j)  OWNERSHIP  OF SHARES.  Except as set forth in the Schedule 13D
filed by WCAS with the SEC on October 20,  1998,  as amended on January 6, 1999,
with  respect to its  ownership  of certain  shares of Company  Common Stock and
certain Company Debt, none of WCAS, HCCP, Newco or their affiliates beneficially
own (within the meaning of Rule 13d-3 under the Exchange  Act) shares of Company
Common Stock or any principal amount of Company Debt.

             (k) SOLVENCY.  Newco hereby  represents that Newco is now and since
inception  has been solvent and that it holds assets the current  value of which
exceed the current value of its debts.

             (l) CONTRIBUTION OBLIGATION.  Newco has received the undertaking of
its sole stockholder obligating the sole stockholder to contribute to the equity
capital of Newco  pursuant to the terms of a letter  agreement  delivered to the
Company concurrently with Newco's execution and delivery of this Agreement.

                                    ARTICLE 4

                    COVENANTS RELATING TO CONDUCT OF BUSINESS

         4.1  AFFIRMATIVE  COVENANTS OF  THE  COMPANY.  During  the  period from
the date of this  Agreement and  continuing  until the Effective  Time except as
expressly  contemplated  or  permitted  by this  Agreement or to the extent that
Newco shall otherwise consent in writing, (i) the Company shall, and shall cause
each of its Subsidiaries  to, carry on its businesses in the usual,  regular and
ordinary  course in  substantially  the same manner as heretofore  conducted and
(ii) the Company  shall,  and shall cause each of its  Subsidiaries  to, use all
reasonable  efforts to preserve  intact its present  business  organization  and
goodwill,  maintain  its rights and  franchises  and retain the  services of its
current  officers  and  key  employees  and  preserve  its  relationships   with
customers, suppliers and others having business dealings with it.

       4.2 NEGATIVE  COVENANTS  OF THE COMPANY.  During the period from the date
of this  Agreement and  continuing  until the Effective Time except as expressly
contemplated  or permitted  by this  Agreement or to the extent that Newco shall
otherwise consent in writing:

                                      A-23
<PAGE>

             (a)  the  Company  shall  not,  and  shall  not  permit  any of its
Subsidiaries  to, (i) declare,  set aside or pay any  dividends on or make other
distributions  in respect of any of its capital stock (except for cash dividends
paid to the  Company  and  its  wholly-owned  Subsidiaries  with  regard  to the
Company's  Subsidiaries'  capital  stock),  or set aside  funds  therefor,  (ii)
adjust,  split,  combine  or  reclassify  any of its  capital  stock,  or issue,
authorize or propose the issuance of any other securities in respect of, in lieu
of or in  substitution  for,  shares of its capital  stock or (iii)  repurchase,
redeem or otherwise acquire any shares of its capital stock,  except as required
by the  terms of its  securities  outstanding  or any Plan in effect on the date
hereof, or set aside funds therefor;

             (b) other than in accordance with the Rights Agreement, the Company
shall  not,  and shall not  permit  any of its  Subsidiaries  to,  (i) grant any
options,  warrants or other  rights to purchase  shares of capital  stock,  (ii)
amend the terms of or reprice any Company Stock Option  outstanding  on the date
of this  Agreement or amend the terms of any Stock Option Plan,  or (iii) except
for shares issuable pursuant to Company Stock Options outstanding on the date of
this Agreement,  shares issuable upon conversion of the Company's 6% Convertible
Subordinated Notes due 2001 and 4.5% Convertible Subordinated Notes due 2003 and
issuances of capital stock of the Company's  Subsidiaries to the Company or to a
wholly-owned  Subsidiary  of  the  Company,  issue,  deliver,  pledge,  sell  or
otherwise  encumber  any shares of its capital  stock,  any Company  Debt or any
Subsidiary Debt, or any securities convertible into, or any rights,  warrants or
options to acquire, any such shares, Company Debt or Subsidiary Debt;

             (c)  the  Company  shall  not,  and  shall  not  permit  any of its
Subsidiaries  to, amend or propose to amend its certificate of  incorporation or
bylaws (or other organizational documents);

             (d)  the  Company  shall  not,  and  shall  not  permit  any of its
Subsidiaries  to, (i) merge or consolidate  with, or acquire any equity interest
in, any corporation, partnership, association or other business organization, or
enter  into an  agreement  with  respect  thereto,  except for (A) a merger of a
wholly-owned  Subsidiary  of the  Company  with or into the  Company  or another
wholly-owned  Subsidiary  of the  Company,  (B) the  creation of a  wholly-owned
Subsidiary of the Company in the ordinary  course of business or (C) investments
in joint ventures not in excess of $5,000,000 in the aggregate,  (ii) acquire or
agree to acquire any material assets, except for (A) acquisitions  involving the
payment of  consideration  by the  Company not in excess of  $10,000,000  in the
aggregate and (B) those acquisitions described on SCHEDULE 4.2(D), or (iii) make
any loan or advance  to, or  otherwise  make any  investment  in, any persons in
excess of  $5,000,000  in the  aggregate,  other than loans or  advances  to, or
investments in, a wholly-owned Subsidiary of the Company existing on the date of
this Agreement;

             (e)  the  Company  shall  not,  and  shall  not  permit  any of its
Subsidiaries  to, sell,  lease,  encumber or  otherwise  dispose of, or agree to
sell,  lease (whether such lease is an operating or capital lease),  encumber or
otherwise dispose of, any of its material assets (including, without limitation,
any capital stock or other ownership interest in any Subsidiary of the Company),
other than sales or leases in the ordinary  course of business  consistent  with
past practice;




                                      A-24
<PAGE>


             (f)  the  Company  shall  not,  and  shall  not  permit  any of its
Subsidiaries (other than wholly-owned  Subsidiaries acquired by the Company) to,
authorize,  recommend,  propose  or  announce  an  intention  to adopt a plan of
complete or partial liquidation or dissolution;

             (g) except for increases in the  compensation  (including,  without
limitation, salary, bonus and other benefits) of employees of the Company or its
Subsidiaries  (other than directors or executive  officers) made in the ordinary
course of business and consistent with past practice, the Company shall not, and
shall not  permit  any of its  Subsidiaries  to,  except as may be  required  by
applicable  Law or  pursuant  to any of the Plans  existing  on the date of this
Agreement, (i) enter into any new, or materially amend any existing,  employment
or severance or termination agreement with any director, officer or key employee
or (ii) become  obligated under any new Plan,  which was not in existence on the
date  hereof,  or amend any such plan or  arrangement  in  existence on the date
hereof if such  amendment  would have the  effect of  materially  enhancing  any
benefits thereunder;

             (h)  the  Company  shall  not,  and  shall  not  permit  any of its
Subsidiaries to, (i) assume or incur any indebtedness for borrowed money (except
for lease obligations incurred in the ordinary course of business and consistent
with the past practice or drawdowns by the Company under its existing  revolving
credit facility, if any, made in the ordinary course of business consistent with
past practice),  (ii) issue or sell any debt securities or warrants or rights to
acquire any debt securities or (iii) guarantee any debt obligations of any other
Person (except obligations of wholly-owned Subsidiaries of the Company);

             (i  the  Company  shall  not,  and  shall  not  permit  any  of its
Subsidiaries to, other than as required by the SEC, applicable Law or GAAP, make
any  material  changes  with  respect to  accounting  policies,  procedures  and
practices;

             (j  the  Company  shall  not,  and  shall  not  permit  any  of its
Subsidiaries  to,  settle  or  compromise  any  claims or  litigation  involving
payments by the Company or any of its  Subsidiaries of more than $500,000 in any
single  instance or related  instances,  or that  otherwise  are material to the
Company and its Subsidiaries, taken as a whole;

             (k  the  Company  shall  not,  and  shall  not  permit  any  of its
Subsidiaries to, make any tax election, or take any tax position,  except in the
ordinary and usual course of business consistent with past practices;

             (l  the  Company  shall  not,  and  shall  not  permit  any  of its
Subsidiaries  to, enter into any license with respect to  Intellectual  Property
unless such license is  non-exclusive  and entered  into in the ordinary  course
consistent with past practice or in accordance with existing  contracts or other
agreements;

             (m  the  Company  shall  not,  and  shall  not  permit  any  of its
Subsidiaries  to, fail to use reasonable  business efforts to keep in full force
and effect insurance comparable in amount and scope of coverage to insurance now
carried by it; and

                                      A-25
<PAGE>

             (n  the  Company  shall  not,  and  shall  not  permit  any  of its
Subsidiaries  to,  agree to or make any  commitment  to,  whether  orally  or in
writing, take any actions prohibited by this Agreement.

                                    ARTICLE 5

                              ADDITIONAL AGREEMENTS

         5.1 ACCESS TO INFORMATION.

             (a Upon reasonable  notice, the Company shall, and shall cause each
of its Subsidiaries to, afford access to the officers,  employees,  accountants,
counsel and other  representatives  of Newco  (including  financing  sources and
their employees, accountants, counsel and other representatives),  during normal
business  hours during the period  prior to the  Effective  Time,  to all of the
Company's  and  its  Subsidiaries'   properties,   books,   leases,   contracts,
commitments,  officers, employees,  accountants,  counsel, other representatives
and records.  The  Confidentiality  Agreements  dated as of January 12, 1999 and
March  24,  1999  between  WCAS  and the  Company  and  HCCP  and  the  Company,
respectively  (the  "Confidentiality  Agreements"),  shall apply with respect to
information   furnished   thereunder  or  hereunder  and  any  other  activities
contemplated thereby or hereby.

             (b During the  period  prior to the  Effective  Time,  the  Company
shall,  and shall cause each of its  Subsidiaries  to, promptly furnish to Newco
(i) a copy of each report,  schedule,  registration statement and other document
filed by it with the SEC, or received  by it from the SEC,  during such  period,
and (ii) all other information concerning its business, properties and personnel
as Newco may reasonably request.

         5.2 NO SOLICITATION.

             (a From and after the date  hereof,  the Company will not, and will
not authorize or (to the extent within its control)  permit any of its officers,
directors,  employees,  agents, affiliates and other representatives or those of
any of its Subsidiaries  (collectively,  "Company Representatives") to, directly
or  indirectly,  initiate,  encourage or solicit  (including by way of providing
information)  any  prospective  acquiror or the  invitation or submission of any
inquiries, proposals or offers or any other efforts or attempts that constitute,
or may reasonably be expected to lead to, any Company  Acquisition  Proposal (as
hereinafter  defined) from any Person or engage in any negotiations with respect
thereto or otherwise  cooperate with or assist or participate  in, or facilitate
any such proposal;  PROVIDED, HOWEVER, that, notwithstanding any other provision
of this Agreement, (i) the Company's Board of Directors may take and disclose to
the  stockholders  of the  Company a position  contemplated  by Rules  14d-9 and
14e-2(a)  promulgated  under the Exchange Act and (ii) following  receipt from a
third party, without any solicitation,  encouragement or initiation, directly or
indirectly, by the Company or any Company Representative, of a bona fide Company
Acquisition Proposal,  (x) the Company may engage in discussions or negotiations
with such third party and may furnish  such third party  information  concerning
it, and its

                                      A-26
<PAGE>

business,  properties and assets if such third party executes a  confidentiality
agreement  in  reasonably  customary  form and (y) the Board of Directors of the
Company  may  withdraw,  modify or not make its  recommendation  referred  to in
Section 5.11(b) or terminate this Agreement in accordance with Article 7, but in
each case referred to in the foregoing  clauses (i) and (ii), only to the extent
that the Company's  Board of Directors shall conclude in good faith based on the
advice of the Company's  outside  counsel that such action is necessary in order
for the Company's  Board of Directors to act in a manner that is consistent with
its fiduciary duties under applicable Law.

             (b The Company shall  immediately  cease and cause to be terminated
any existing solicitation,  initiation,  encouragement,  activity, discussion or
negotiation with any parties conducted  heretofore by the Company or any Company
Representatives with respect to any Company Acquisition Proposal existing on the
date hereof.

             (c The Company  will  promptly  (and in any event  within 24 hours)
communicate  to Newco  the  terms  and  conditions  of any  Company  Acquisition
Proposal  that it may  receive  and will keep Newco  informed,  as  promptly  as
reasonably  practicable,  as  to  the  status  of  any  actions,  including  any
discussions, taken pursuant to such Company Acquisition Proposal.

             (d As used in this Agreement,  "Company Acquisition Proposal" means
any  inquiry,  proposal  or offer  from any  Person  relating  to any  direct or
indirect  acquisition  or purchase of a business that  constitutes  one-third or
more  of the  net  revenues,  net  income  or  assets  of the  Company  and  its
Subsidiaries,  taken as a whole, or one-third or more of the outstanding Company
Common  Stock,  any tender  offer or exchange  offer that if  consummated  would
result in any Person  beneficially  owning  one-third or more of the outstanding
Company  Common  Stock,  or any  merger,  consolidation,  business  combination,
recapitalization,  liquidation, dissolution or similar transaction involving the
Company (or any Subsidiary or Subsidiaries whose business constitutes  one-third
or more of the net  revenues,  net  income  or  assets  of the  Company  and its
Subsidiaries taken as a whole), other than the transactions contemplated by this
Agreement.

         5.3 FEES AND EXPENSES.

             (a Except as otherwise provided in this Section 5.3 and except with
respect to claims for damages  incurred as a result of a material breach of this
Agreement, all costs and expenses incurred in connection with this Agreement and
the transactions  contemplated  hereby shall be paid by the party incurring such
expense,  except that the Company shall pay all costs and expenses in connection
with the printing and mailing of the Proxy Statement,  as well as all SEC filing
fees related to the transactions contemplated hereby.

                 (b In the event of the  termination  of this  Agreement  (i) by
Newco under Section 7.1(f), (ii) by the Company under Section 7.1(g) or (iii) by
Newco under Section  7.1(h) if, and only if (in the case of termination by Newco
under Section 7.1(h)) within 275 days after such termination, the Company enters
into a definitive  agreement with respect to a transaction proposed in a Company
Acquisition  Proposal  that was  submitted  to the Company  prior to the Company
Stockholder  Meeting and thereafter  consummates  such transaction with 462 days
after such ter-


                                      A-27
<PAGE>

mination, then the Company shall (A) pay to Newco or its designee (provided that
Newco is not in material breach of its  obligations  under this Agreement on the
date of any such termination),  a fee in the amount of $25,000,000 (the "Company
Termination  Fee"), in cash, by wire transfer of immediately  available funds to
an  account  designated  by Newco and (B)  reimburse  Newco  for the  documented
out-of-pocket fees and expenses  reasonably  incurred thereby in connection with
this Agreement and the transactions  contemplated  hereby (including those which
may be incurred in connection  with  enforcing the terms of this Section 5.3) in
an aggregate  amount not in excess of $4,000,000 (the  "Expenses").  The Company
shall pay the Company Termination Fee to Newco on the day of termination of this
Agreement (or in the case of clause (iii) above,  on the date of consummation of
such   transaction).   The  Company  shall   reimburse  the  Expenses  to  Newco
concurrently with, or after the payment of the Company Termination Fee but in no
event prior to the  delivery by Newco to the  Company of a  reasonably  detailed
statement of the Expenses and any supporting  documentation reasonably requested
by the Company.

         5.4  BROKERS OR FINDERS.

             (a) The Company represents,  as to itself, its Subsidiaries and its
affiliates, that no agent, broker, investment banker, financial advisor or other
firm or person is or will be  entitled  to any  broker's  or finders  fee or any
other  commission  or similar  fee in  connection  with any of the  transactions
contemplated by this Agreement, except for the Financial Advisor, whose fees and
expenses will be paid by the Company in accordance with the Company's agreements
with such firm  (copies of which  have been  delivered  by the  Company to Newco
prior to the date of this Agreement).

             (b) Newco  represents  that no agent,  broker,  investment  banker,
financial  advisor  or  other  firm or  person  engaged  by  Newco is or will be
entitled to receive  from the  Company any  broker's or finders fee or any other
commission  or  similar  fee  in  connection   with  any  of  the   transactions
contemplated by this Agreement except as set forth on SCHEDULE 5.4(B).

         5.5 INDEMNIFICATION; DIRECTORS' AND OFFICERS' INSURANCE.

         (a Newco  agrees  that  all  rights  to  indemnification  existing   in
favor of the present or former directors,  officers and employees of the Company
(as such) or any of its  Subsidiaries or present or former  directors,  officers
and employees of the Company or any of its Subsidiaries serving or who served at
the  Company's  or any of its  Subsidiaries'  request  as a  director,  officer,
employee or agent of another  corporation,  partnership,  joint venture,  trust,
employee  benefit  plan  or  other  enterprise,  as  provided  in the  Company's
certificate of incorporation or bylaws, or the articles of incorporation, bylaws
or  similar   documents   of  any  of  the   Company's   Subsidiaries   and  the
indemnification agreements with such present and former directors,  officers and
employees as in effect as of the date hereof with  respect to matters  occurring
at or prior to the Effective  Time,  shall survive the Merger and shall continue
in full force and effect and  without  modification  (other  than  modifications
which would enlarge the indemnification  rights) for a period of six years after
the Effective  Time, and the Surviving  Corporation  shall comply fully with its
obligations  hereunder  and  thereunder.  Without  limiting the  foregoing,  the
Company shall,  and after the Effective


                                      A-28
<PAGE>

Time, the Surviving  Corporation shall periodically advance expenses as incurred
with respect to the foregoing  (including  with respect to any action to enforce
rights to  indemnification or the advancement of expenses) to the fullest extent
permitted under applicable Law; PROVIDED,  HOWEVER,  that the person to whom the
expenses  are advanced  provides an  undertaking  (without  delivering a bond or
other  security) to repay such advance if it is ultimately  determined that such
person is not entitled to indemnification.

         (b The  Company  shall,  and  from  and  after the Effective  Time, the
Surviving Corporation shall, for a period of six years after the Effective Time,
indemnify,  defend and hold  harmless each person who is now, or has been at any
time prior to the date of this  Agreement or who becomes  prior to the Effective
Time,  an  officer,  director,  employee  or agent of the  Company or any of its
Subsidiaries  (collectively,  the  "Indemnified  Parties")  against  all losses,
expenses (including  attorneys' fees), claims,  damages,  liabilities or amounts
that are paid in settlement with the approval of the  indemnifying  party (which
approval  shall not be  unreasonably  withheld)  of, or otherwise in  connection
with, any threatened or actual claim, action, suit,  proceeding or investigation
(a "Claim"),  based in whole or in part on or arising in whole or in part out of
the fact that the Indemnified Party (or the person controlled by the Indemnified
Party) is or was a director, officer, employee or agent of the Company or any of
its Subsidiaries and pertaining to any matter existing or arising out of actions
or omissions  occurring at or prior to the Effective  Time  (including,  without
limitation,  any Claim arising out of this Agreement or any of the  transactions
contemplated  hereby),  whether  asserted  or claimed  prior to, at or after the
Effective Time, in each case to the fullest extent permitted under Delaware law,
and shall pay any expenses,  as incurred, in advance of the final disposition of
any such action or proceeding to each  Indemnified  Party to the fullest  extent
permitted  under  Delaware law. In determining  whether an Indemnified  Party is
entitled  to  indemnification  under this  Section  5.5,  if  requested  by such
Indemnified  Party,  such  determination  shall be made by special,  independent
counsel  selected by the Surviving  Corporation  and approved by the Indemnified
Party  (which  approval  shall not be  unreasonably  withheld),  and who has not
otherwise  performed  services for the Surviving  Corporation  or its affiliates
within  the last three  years  (other  than in  connection  with such  matters).
Without  limiting  the  foregoing,  in the event any such claim,  action,  suit,
proceeding or investigation is brought against any Indemnified  Parties (whether
arising before or after the Effective  Time),  (i) the  Indemnified  Parties may
retain the  Company's  regularly  engaged  independent  legal counsel or counsel
satisfactory to them and reasonably satisfactory to the Company (or satisfactory
to them and  reasonably  satisfactory  to the  Surviving  Corporation  after the
Effective  Time),  and the Company (or after the Effective  Time,  the Surviving
Corporation)  shall pay all reasonable fees and expenses of such counsel for the
Indemnified  Parties as promptly as statements  therefor are received;  and (ii)
the Company (or after the Effective  Time, the Surviving  Corporation)  will use
all  reasonable  efforts to assist in the  vigorous  defense of any such matter,
provided that neither the Company nor the Surviving  Corporation shall be liable
for any settlement  effected  without its prior written  consent,  which consent
shall not  unreasonably be withheld.  In the event of any Claim, any Indemnified
Party  wishing to claim  indemnification  will  promptly  notify the Company (or
after the Effective  Time,  the Surviving  Corporation)  thereof  (provided that
failure to so notify the Surviving  Corporation  will not affect the obligations
of the Surviving Corporation except to the extent that the Surviving Corporation
shall have been prejudiced as a result of such failure) and shall deliver to the


                                      A-29
<PAGE>

Company (or after the effective Time, the Surviving Corporation) the undertaking
contemplated  by Section 145(e) of the DGCL, but without any requirement for the
posting of a bond.  Without limiting the foregoing,  in the event any such Claim
is brought against any of the Indemnified Parties,  such Indemnified Parties may
retain only one law firm (plus one local  counsel,  if  necessary)  to represent
them with  respect  to each such  matter  unless  the use of  counsel  chosen to
represent the Indemnified  Parties would present such counsel with a conflict of
interest,  or the  representation of all of the Indemnified  Parties by the same
counsel would be inappropriate  due to actual or potential  differing  interests
between them, in which case such additional counsel as may be required (as shall
be  reasonably  determined  by the  Indemnified  Parties  and the Company or the
Surviving  Corporation,  as the case may be) may be retained by the  Indemnified
Parties at the cost and expense of the Company  (or the  Surviving  Corporation)
and the Company (or the Surviving Corporation) shall pay all reasonable fees and
expenses  of such  counsel  for such  Indemnified  Parties.  The Company (or the
Surviving  Corporation)  shall  use all  reasonable  efforts  to  assist  in the
vigorous defense of any such Claim,  provided that the Company (or the Surviving
Corporation) shall not be liable for any settlement effected without its written
consent,   which  consent,   however,   shall  not  be  unreasonably   withheld.
Notwithstanding  the foregoing,  nothing  contained in this Section 5.5 shall be
deemed to grant any right to any Indemnified  Party which is not permitted to be
granted to an officer, director, employee or agent of the Company under Delaware
law, assuming for such purposes that the Company's  certificate of incorporation
and bylaws provide for the maximum indemnification permitted by law.

             (c  For a  period  of six  years  after  the  Effective  Time,  the
Surviving   Corporation  shall  maintain  officers'  and  directors'   liability
insurance and  fiduciary  liability  insurance  ("D&O  Insurance")  covering the
persons  described in paragraph (a) of this Section 5.5 (whether or not they are
entitled  to  indemnification  thereunder)  who  are  currently  covered  by the
Company's  existing  officers' and directors' or fiduciary  liability  insurance
policies on terms no less  advantageous  to such  indemnified  parties than such
existing insurance; PROVIDED that the Surviving Corporation will not be required
to pay an annual  premium  therefor in excess of 200% of the last annual premium
paid prior to the date hereof (the "Current Premium");  and, PROVIDED,  FURTHER,
that if the existing D&O Insurance expires, is terminated or canceled during the
six-year period, the Surviving Corporation will use reasonable efforts to obtain
as much D&O  Insurance as can be obtained for the remainder of such period for a
premium on an annualized basis not in excess of 200% of the Current Premium.

             (d In the event the Surviving  Corporation or any of its respective
successors or assigns (i) consolidates  with or merges into any other Person and
is not the continuing or surviving  corporation or entity of such  consolidation
or merger or (ii)  transfers  all or  substantially  all of its  properties  and
assets  to any  Person,  proper  provisions  shall be made so that  such  Person
assumes the obligations set forth in this Section 5.5.

             (e The Company will honor the indemnification agreements identified
in SCHEDULE  5.5(E).  The  Company  may,  with the consent of Newco,  enter into
substantially  similar  indemnification  agreements  with  other  directors  and
officers of the Company.

                                      A-30
<PAGE>

             (f This Section 5.5,  which shall survive the  consummation  of the
Merger  at the  Effective  Time and shall  continue  for the  periods  specified
herein, is intended to benefit the Company, the Surviving  Corporation,  and any
Person referenced in this Section 5.5 or indemnified  hereunder each of whom may
enforce  the  provisions  of this  Section  5.5  (whether or not parties to this
Agreement).

         5.6  REASONABLE EFFORTS.

             (a) Subject to the terms and conditions of this Agreement,  each of
the parties hereto agrees to use all reasonable  efforts to take, or cause to be
taken, all action and to do, or cause to be done, all things  necessary,  proper
or  advisable,  under  applicable  Laws or  otherwise,  to  consummate  and make
effective  the  transactions   contemplated  by  this  Agreement,   subject,  if
applicable,  to the Company Stockholder  Approval,  including  cooperating fully
with the other party or parties.  The Company will use all reasonable efforts to
obtain any consent from third parties necessary to allow the Company to continue
operating its business as presently conducted as a result of the consummation of
the transactions contemplated hereby.

             (b) In case at any time  after  the  Effective  Time,  any  further
action is necessary or desirable to carry out the purposes of this  Agreement or
to vest the Surviving  Corporation  with full title to all  properties,  assets,
rights, approvals, immunities and franchises of the Company, the parties to this
Agreement shall direct their respective  officers and directors to take all such
necessary action.

         5.7  PUBLICITY.  The  parties  will  consult  with each  other and will
mutually agree upon any press release or public  announcement  pertaining to the
Merger or this  Agreement and shall not issue any such press release or make any
such public announcement prior to such consultation and agreement, except as may
be required by applicable law (or stock exchange rules), in which case the party
proposing to issue such press release or make such public announcement shall use
reasonable  efforts to consult in good faith with the other party before issuing
any such press release or making any such public announcement.

         5.8 HSR AND OTHER GOVERNMENTAL APPROVALS.

             (a Each  party  hereto  shall  file or cause  to be filed  with the
Federal  Trade  Commission  (the  "FTC")  and  the  Antitrust  Division  of  the
Department of Justice (the "Antitrust Division") any notification required to be
filed by their respective  "ultimate parent" companies under the HSR Act and the
rules and regulations  promulgated  thereunder with respect to the  transactions
contemplated in this Agreement.  Such parties will use all reasonable efforts to
make such filings  promptly and to respond on a timely basis to any requests for
additional  information  made by either of such  agencies.  Each of the  parties
hereto  agrees to furnish the other with copies of all  correspondence,  filings
and  communications  (and memoranda setting forth the substance thereof) between
it and its affiliates and their respective representatives, on the one hand, and
the FTC, the Antitrust Division or any other  Governmental  Entity or members or
their respective  staffs,  on the other hand, with respect to the Merger,  other
than personal financial information filed therewith.

                                      A-31
<PAGE>

             (b Each party hereto shall cooperate and use its reasonable efforts
to promptly prepare and file all necessary documentation to effect all necessary
applications,  notices,  petitions,  filings  and other  documents,  and use all
reasonable  efforts to obtain (and will  cooperate with each other in obtaining)
any consent, acquiescence, authorization, order or approval of, or any exemption
or nonopposition by, any Governmental  Entity required to be obtained or made by
Newco or the Company or any of their  respective  affiliates in connection  with
the Merger or the taking of any other  action  contemplated  by this  Agreement;
provided,  however,  that the Company and its respective affiliates shall not be
required to divest of any assets in connection therewith.

             (c Each  party  hereto  agrees  to  furnish  the  other  with  such
necessary  information  and  reasonable  assistance  as such other party and its
affiliates  may  reasonably  request in  connection  with their  preparation  of
necessary   filings,   registrations   or  submissions  of  information  to  any
Governmental Entities,  including without limitation any filings necessary under
the provisions of the HSR Act.

             (d Without  limiting  the  foregoing,  the Company and its Board of
Directors shall (i) use their commercially reasonable efforts to take all action
necessary or otherwise  reasonably  requested by Newco to exempt the Merger from
the provisions of any applicable takeover,  business combination,  control share
acquisition or similar statute and (ii) if any state takeover statute or similar
statute or regulation  becomes  applicable to this Agreement or the Merger,  use
its commercially  reasonable efforts to take all action necessary to ensure that
the  Merger  may  be  consummated  as  promptly  as  practicable  on  the  terms
contemplated  by this  Agreement  and  otherwise  to minimize the effect of such
statute or regulation on the Merger.

         5.9  NOTIFICATION  OF CERTAIN  MATTERS.  Each party  shall give  prompt
written notice to the other of (a) the  occurrence,  or failure to occur, of any
event of which it becomes aware that has caused or that would be likely to cause
any  representation  or warranty of such party contained in this Agreement to be
untrue or inaccurate in any material respect at any time from the date hereof to
the Closing  Date and (b) the failure of such party to comply with or satisfy in
any material respect any covenant, condition or agreement to be complied with or
satisfied by it hereunder;  provided,  however,  that the delivery of any notice
pursuant to this  Section 5.9 shall not limit or  otherwise  affect the remedies
available hereunder to any of the party or parties receiving such notice.

         5.10 CONTINUATION OF EMPLOYEE BENEFITS.

              (a From  and  after  the Effective Time, the Surviving Corporation
and its  Subsidiaries  will honor in  accordance  with their terms all  existing
employment, severance, consulting and salary continuation agreements between the
Company or any of its Subsidiaries and any current or former officer,  director,
employee or  consultant  of the Company or any of its  Subsidiaries  or group of
such officers, directors, employees or consultants described on SCHEDULE 5.10.

             (b In addition to honoring the  agreements  referred to in SCHEDULE
5.10,  until  the  first  anniversary  of  the  Effective  Time,  the  Surviving
Corporation will not materially alter the ben-


                                      A-32
<PAGE>

efits (including  health  benefits,  severance  policies and general  employment
policies and procedures)  that are available to employees of the Company and its
Subsidiaries on the date hereof. Nothing in this Section 5.10(b) shall be deemed
to prevent the Surviving  Corporation or any of its Subsidiaries from making any
change required by applicable Law.

             (c To the extent  permitted under  applicable Law, each employee of
the Company or its  Subsidiaries  shall be given credit for all service with the
Company  or  its  Subsidiaries  (or  service  credited  by  the  Company  or its
Subsidiaries)  under  all  employee  benefit  plans,   programs,   policies  and
arrangements  maintained by the Surviving  Corporation in which they participate
or in which they become  participants  for purposes of eligibility,  vesting and
benefit accrual including,  without limitation,  for purposes of determining (i)
short-term and long-term  disability  benefits,  (ii severance  benefits,  (iii)
vacation benefits and (iv) benefits under any retirement plan.

             (d This Section 5.10,  which shall survive the  consummation of the
Merger  at the  Effective  Time and  shall  continue  without  limit  except  as
expressly  set forth  herein,  is intended to benefit and bind the Company,  the
Surviving  Corporation  and any Person  referenced in this Section 5.10, each of
whom may enforce the  provisions  of this Section 5.10 whether or not parties to
this  Agreement.  Except as provided in clause (a) above,  nothing  contained in
this Section 5.10 shall create any beneficiary  rights in any employee or former
employee  (including  any  dependent  thereof)  of  the  Company,   any  of  its
Subsidiaries or the Surviving Corporation in respect of continued employment for
any specified period of any nature or kind whatsoever.

        5.11 PREPARATION OF THE PROXY STATEMENT; STOCKHOLDERS MEETING.

             (a As soon as practicable following the date of this Agreement, the
Company  shall  prepare the Proxy  Statement,  and the Company shall prepare and
file with the SEC the Proxy Statement.  Newco will cooperate with the Company in
connection  with the  preparation  of the  Proxy  Statement  including,  but not
limited to,  furnishing to the Company any and all  information  regarding Newco
and its affiliates as may be required to be disclosed therein.  The Company will
use its  commercially  reasonable  efforts  to cause the Proxy  Statement  to be
mailed to its  stockholders  as promptly as  practicable  after the date of this
Agreement. The Company and Newco agree to correct any information provided by it
for use in the Proxy Statement which shall have become false or misleading.  The
Company will as promptly as  practicable  notify Newco of (i) the receipt of any
comments  from the SEC and (ii) any request by the SEC for any  amendment to the
Proxy Statement or for additional information.

             (b The Company will, as soon as  practicable  following the date of
this  Agreement,  duly call,  give notice of, convene and hold the  Stockholders
Meeting for the purpose of adopting this Agreement and approving the Merger.  At
the Stockholders Meeting,  Newco shall cause all of the shares of Company Common
Stock then owned by Newco or any of its  affiliates  to be voted in favor of the
adoption of this  Agreement  and the approval of the Merger.  The Company  will,
through its Board of Directors,  recommend to its  stockholders  approval of the
foregoing  matters,  as set forth in,  and  subject  to,  Section  3.1(p).  Such
recommendation,  together  with a copy of the  opinion  referred  to in  Section
3.1(m), shall be included in the Proxy Statement.

                                      A-33
<PAGE>

         5.12  SOLVENCY LETTER.

         Prior to the Effective Time, Newco shall cause the valuation firm which
delivers a solvency letter (the "Solvency Letter") to the financial institutions
providing the Financing Commitments (or, if no Solvency Letter has been provided
thereto,  a  valuation  firm  reasonably  acceptable  to the  Company)  to  have
delivered to the Company a Solvency  Letter  addressed to the Board of Directors
in form and substance  reasonably  acceptable  thereto as to the solvency of the
Surviving   Corporation  after  giving  effect  to  the  Merger,  the  financing
arrangements  contemplated  by Newco  with  respect  to the Merger and the other
transactions contemplated hereby (the "Solvency Letter Condition").  The parties
hereto  agree to cooperate  with the firm  delivering  the Solvency  Letter (the
"Appraiser")  in  connection  with  the  preparation  of  the  Solvency  Letter,
including,  without  limitation,  providing the Appraiser  with any  information
reasonably  available to them necessary for the  Appraiser's  preparation of the
Solvency Letter. 5.13 RECAPITALIZATION.  Each of the Company and Newco shall use
all reasonable efforts to cause the transactions contemplated by this Agreement,
including  the  Merger,  to be  accounted  for as a  recapitalization  and  such
accounting  treatment to be accepted by their respective  accountants and by the
SEC,  and each of the Company and Newco agrees that it shall take no action that
would  reasonably  be  likely  to  cause  such  accounting  treatment  not to be
obtained.  In the event that Newco reasonably  determines that it cannot account
for the transactions  contemplated by this Agreement as a recapitalization,  the
parties shall take all commercially  reasonable  actions to amend this Agreement
to provide that not more than 7% of the  outstanding  Company Common Stock after
giving effect to the transactions  contemplated  hereby shall be retained by the
existing stockholders of the Company,  substantially on the terms and conditions
set forth in the Original  Merger  Agreement.  The terms of this Agreement shall
continue in effect in such amendment to the extent  consistent  with the revised
transaction  structure.  Any terms  required to be revised to  accommodate  such
revised structure shall be reasonably acceptable to both parties hereto.

         5.14 OTHER ACTIONS.  Except as expressly permitted by the terms of this
Agreement,  no party  hereto will  knowingly or  intentionally  take or agree or
commit to take, nor will it permit any of its  Subsidiaries  to take or agree or
commit to take,  any action  that is  reasonably  likely to result in any of its
representations or warranties hereunder being untrue in any material respect.

                                    ARTICLE 6

                              CONDITIONS PRECEDENT

         6.1  CONDITIONS TO EACH PARTY'S  OBLIGATION  TO EFFECT THE MERGER.  The
respective  obligations  of each party to effect the Merger  shall be subject to
the satisfaction or waiver, where permissible, by each party hereto prior to the
Effective Time of the following conditions:

                 (a STOCKHOLDER APPROVAL. This Agreement shall have been adopted
by the affirmative  vote of the holders of a majority of the outstanding  shares
of Company Common Stock entitled to vote thereon; provided that Newco shall, and
shall cause its  affiliates to, vote all shares of


                                      A-34
<PAGE>

Company  Common  Stock owned by Newco or any of its  affiliates  in favor of the
adoption of this Agreement.

             (b HSR Act  and  other  approvals.  The  waiting  period  (and  any
extension  thereof)  applicable  to the Merger under the HSR Act shall have been
terminated or shall have expired,  the approvals listed on Schedule  3.1(c)(iii)
shall have been obtained and no restrictive  order or other  requirements  shall
have  been  placed  on the  Company,  Newco  or  the  Surviving  Corporation  in
connection therewith.

             (c No Injunctions or Restraints.  No temporary  restraining  order,
preliminary  or  permanent  injunction  or other  order  issued  by any court of
competent jurisdiction or other legal restraint or prohibition (an "Injunction")
preventing the consummation of the Merger shall be in effect; provided, however,
that prior to  invoking  this  condition,  each party  shall use all  reasonable
efforts to have any such Injunction vacated.

             (d Statutes.  No statute,  rule, order,  decree or regulation shall
have been enacted,  promulgated or otherwise issued by any  Governmental  Entity
which prohibits the consummation of the Merger.

        6.2  CONDITIONS  TO OBLIGATIONS  OF NEWCO.  The  obligations of Newco to
effect the Merger are further subject to the following conditions, any or all of
which may be waived in whole or in part by Newco,  to the  extent  permitted  by
applicable Law:

             (a the  representations  and warranties of the Company set forth in
this Agreement shall be true and correct in all material respects (provided that
any  representation  or warranty of the Company contained herein that is subject
to a materiality,  Material Adverse Effect or similar qualification shall not be
so qualified for purposes of determining  the existence of any breach thereof on
the part of the Company) as of the date of this  Agreement and as of the Closing
Date as though made on and as of the Closing Date and Newco shall have  received
a certificate signed on behalf of the Company by the chief executive officer and
the chief  financial  officer  of the  Company  to the  effect set forth in this
paragraph;

             (b the Company shall have performed the obligations  required to be
performed by it under this  Agreement at or prior to the Closing Date except for
such  failures to perform as have not had or could not  reasonably  be expected,
either  individually or in the aggregate,  to have a Material  Adverse Effect on
the Surviving Corporation (provided that any obligation the performance of which
is subject to a materiality,  Material  Adverse Effect or similar  qualification
shall not be so  qualified  for  purposes of  determining  the  existence of any
nonperformance  thereof) and Newco shall have received a  certificate  signed on
behalf of the Company by the chief  executive  officer  and the chief  financial
officer of the Company to the effect set forth in this paragraph; and

             (c Newco shall have  obtained the  Financing  substantially  on the
terms  contemplated  by the Financing  Commitments or  alternative  financing on
terms no less  favorable  in any  material  respect  than those set forth in the
Financing Commitments, unless the failure to obtain


                                      A-35
<PAGE>

the  Financing  was the result of a failure by Newco to perform any  covenant or
condition contained therein or herein or the inaccuracy of any representation or
warranty of Newco.

         6.3  CONDITIONS  TO OBLIGATION  OF THE COMPANY.  The  obligation of the
Company to effect the Merger is further subject to the following conditions, any
or all of which may be waived in whole or in part by the Company,  to the extent
permitted by applicable Law:

             (a the  representations  and  warranties of Newco set forth in this
Agreement shall be true and correct in all material respects  (provided that any
representation  or  warranty  of Newco  contained  herein  that is  subject to a
materiality,  Material Adverse Effect or similar  qualification  shall not be so
qualified for purposes of determining the existence of any breach thereof on the
part of Newco) as of the date of this  Agreement  and as of the Closing  Date as
though made on and as of the Closing Date and the Company  shall have received a
certificate  signed on behalf of Newco by the  president  of Newco to the effect
set forth in this paragraph;

             (b Newco  shall  have  performed  the  obligations  required  to be
performed by it under this  Agreement at or prior to the Closing Date except for
such  failures to perform as have not had or could not  reasonably  be expected,
either  individually or in the aggregate,  to have a Material  Adverse Effect on
the Surviving Corporation (provided that any obligation the performance of which
is subject to a materiality,  Material  Adverse Effect or similar  qualification
shall not be so  qualified  for  purposes of  determining  the  existence of any
nonperformance thereof) and the Company shall have received a certificate signed
on behalf of Newco by the  president  of Newco to the  effect  set forth in this
paragraph;

             (c the Solvency Letter Condition; and

             (d Newco shall have  obtained the  Financing  substantially  on the
terms  contemplated  by the Financing  Commitments or  alternative  financing on
terms no less  favorable  in any  material  respect  than those set forth in the
Financing Commitments.

                                    ARTICLE 7

                            TERMINATION AND AMENDMENT

         7.1 TERMINATION. This Agreement may be terminated and the Merger may be
abandoned  at any time  prior to the  Effective  Time,  whether  before or after
adoption of this Agreement by the stockholders of the Company:

             (a by mutual written consent of the Company and Newco;

             (b by Newco or the Company if any court of  competent  jurisdiction
in the United  States or other  Governmental  Entity shall have issued an order,
decree or ruling, or taken any other action restraining,  enjoining or otherwise
prohibiting the Merger and such order, decree, ruling or other action shall have
become final and non-appealable;

                                      A-36
<PAGE>

             (c by Newco or the  Company  if the  Effective  Time shall not have
occurred on or before August 31, 1999 (the  "Termination  Date"),  provided that
the right to terminate  this  Agreement  under this Section  7.1(c) shall not be
available to any party whose breach of any  obligation  under this Agreement has
been the cause of or resulted in the failure of the  Effective  Time to occur on
or before such date;

             (d by Newco,  if (i) any of the  representations  and warranties of
the Company contained in this Agreement shall fail to be true and correct in any
material respect when made or have since become,  and at the time of termination
remain,  untrue or incorrect in any material respect,  or (ii) the Company shall
have  breached  or  failed to comply  in any  material  respect  with any of its
obligations under this Agreement (other than as a result of a breach by Newco of
any of its  obligations  under this  Agreement)  and such failure or breach with
respect  to any such  representation,  warranty  or  obligation  shall  continue
unremedied for ten days after the Company has received written notice from Newco
of the  occurrence  of such failure or breach  (provided  that in no event shall
such ten-day period extend beyond the Termination Date);

             (e by the Company if (i) any of the  representations and warranties
of Newco  contained in this  Agreement  shall fail to be true and correct in any
material respect when made or have since become,  and at the time of termination
remain,  untrue or incorrect in any material  respect,  or (ii) Newco shall have
breached or failed to comply in any material respect with any of its obligations
under this  Agreement  (other than as a result of a breach by the Company of any
of its obligations under this Agreement) and such failure or breach with respect
to any such representation, warranty or obligation shall continue unremedied for
ten days  after  Newco has  received  written  notice  from the  Company  of the
occurrence  of such  failure  or breach  (provided  that in no event  shall such
ten-day period extend beyond the Termination Date);

             (f by Newco if the Board of  Directors  of the  Company  shall have
withdrawn or modified,  in any manner which is materially  adverse to Newco, its
recommendation or approval of this Agreement and the Merger;

             (g by the Company, if in the exercise of its good faith judgment as
to fiduciary  duties to its  stockholders  imposed by law, as advised by outside
counsel,  the Board of Directors of the Company determines that such termination
is required by reason of a Company  Acquisition  Proposal  being made;  provided
that the Company shall notify Newco  promptly of its intention to terminate this
Agreement  or enter into a  definitive  agreement  with  respect to any  Company
Acquisition Proposal,  and provided further that the Company may not effect such
termination   pursuant   to  this   Section   7.1(g)   unless  the  Company  has
contemporaneously  with such  termination  tendered  payment  to  Newco,  or its
designee, of the Company Termination Fee pursuant to Section 5.3; and

             (h by Newco or the  Company  if the  Company  fails to  obtain  the
Company  Stockholder  Approval at the  Stockholder  Meeting (or any  adjournment
thereof).

                                      A-37
<PAGE>

         7.2  EFFECT  OF  TERMINATION.  In the  event  of  termination  of  this
Agreement by any party hereto as provided in Section 7.1, this  Agreement  shall
forthwith become void and there shall be no liability or obligation hereunder on
the part of any party hereto or their respective affiliates, officers, directors
or  stockholders,  except (a) the last sentence of Section 5.1(a),  Section 5.3,
this Section 7.2 and Article 8 shall survive such  termination,  and (b) no such
termination  shall relieve any party from  liability for a breach of any term or
provision hereof. The Confidentiality  Agreements shall remain in full force and
effect following any termination of this Agreement.

         7.3 AMENDMENT. This Agreement may be amended, modified or supplemented,
only by  written  agreement  of Newco and the  Company  at any time prior to the
Effective  Time with  respect to any of the terms  contained  herein;  provided,
however,  that,  after the Company  Stockholder  Approval,  no term or condition
contained in this  Agreement  shall be amended or modified in any manner that by
Law requires  further  approval by the  stockholders  of the Company  without so
obtaining such further stockholder approval.

         7.4  EXTENSION;  WAIVER.  At any time prior to the Effective  Time, the
parties  hereto,  by action taken or  authorized by their  respective  Boards of
Directors,  may,  to the  extent  legally  allowed  (a  extend  the time for the
performance of any of the obligations or other acts of the other parties hereto,
(b) waive any  inaccuracies  in the  representations  and  warranties  contained
herein or in any document  delivered  pursuant  hereto and (c) waive  compliance
with any of the agreements or conditions  contained herein. Any agreement on the
part of a party  hereto to any such  extension  or waiver shall be valid only if
set forth in a written instrument signed on behalf of such party. The failure of
any party hereto to assert any of its rights  hereunder  shall not  constitute a
waiver of such rights.

                                    ARTICLE 8

                               GENERAL PROVISIONS

         8.1   NONSURVIVAL   OF   COVENANTS   AND   AGREEMENTS.   None   of  the
representations,  warranties,  covenants and  agreements in this Agreement or in
any instrument  delivered pursuant to this Agreement shall survive the Effective
Time,  except for the covenants and  agreements  contained in Article 2, Section
5.3,  Section  5.5,  Section  5.10 and any  other  covenant  or  agreement  that
contemplates performance after the Effective Time.

         8.2 CONFIDENTIALITY  AGREEMENTS.  The Confidentiality  Agreements shall
survive the execution and delivery of this Agreement or any  termination of this
Agreement,  and the provisions of the Confidentiality  Agreements shall apply to
all information and material delivered by any party hereunder.

         8.3  NOTICES.  Any  notice  or  communication   required  or  permitted
hereunder  shall be in writing and either  delivered  personally,  delivered  by
nationally  recognized  overnight  courier or telecopied or sent by certified or
registered  mail,  postage prepaid,  and shall be deemed to be given,  dated and
received  when so  delivered  personally,  delivered  by  nationally  recognized
overnight

                                      A-38
<PAGE>

courier  or  telecopied  or, if  mailed,  five  business  days after the date of
mailing to the following address or telecopy number, or to such other address or
addresses as such person may subsequently designate by notice given hereunder:

          (a     if to Newco, to:

                 Yankee Acquisition Corp.
                 c/o Welsh, Carson, Anderson & Stowe VIII, L.P.
                 320 Park Avenue, Suite 2500 New York, New York 10022-6815
                 Attn: Paul B. Queally Facsimile: 212/893-9566

                 with copies to:

                 Reboul, MacMurray, Hewitt, Maynard & Kristol
                 45 Rockefeller Plaza New York, New York 10111
                 Attn: Robert A. Schwed Facsimile: 212/841-5725

          (b     if to the Company, to:

                 Concentra Managed Care, Inc.
                 5080 Spectrum Drive, Suite 400, West Tower Addison, Texas 75248
                 Attn: Richard A. Parr II Facsimile: 972/387-1938

                 and

                 Concentra Managed Care, Inc.
                 312 Union Wharf Boston, Massachusetts 02109
                 Attn: Daniel J. Thomas Facsimile: 617/367-8519

                 with a copy to:

                 Vinson & Elkins L.L.P. 2001 Ross Avenue, Suite 3700 Dallas,
                 Texas 75201
                 Attn: Jeffrey A. Chapman Facsimile: 214/999-7797

          (c     if to the Special Committee, to:

                 Hon. Willis D. Gradison Patton Boggs LLP
                 2550 M Street, N.W. Washington, D.C. 20037-1350
                 Facsimile: 202/457-8315

                 and


                                      A-39
<PAGE>

                 George H. Conrades Polaris Venture Partners
                 1000 Winter St., Suite 3350 Waltham, Massachusetts 02451

                 Facsimile: 781/290-0880

                 with a copy to:

                 Ropes & Gray One International Place
                 Boston, Massachusetts 02110
                 Attn: David C. Chapin
                 Facsimile: 617/951-7050

         8.4  INTERPRETATION.  When a  reference  is made in this  Agreement  to
Articles or Sections,  such reference  shall be to an Article or Section of this
Agreement  unless  otherwise  indicated.  The  table of  contents  and  headings
contained in this Agreement are for reference purposes only and shall not affect
in any way the meaning or  interpretation  of this Agreement.  Whenever the word
"include,"  "includes" or "including" are used in this Agreement,  they shall be
deemed to be  followed  by the words  "without  limitation."  The  phrase  "made
available" in this  Agreement  shall mean that the  information  referred to has
been made  available if requested by the party to whom such  information is made
available.

         8.5  COUNTERPARTS.  This Agreement may be executed in two counterparts,
each of which shall be  considered  one and the same  agreement and shall become
effective  when two  counterparts  have been  signed by each of the  parties and
delivered to the other  party,  it being  understood  that both parties need not
sign the same counterpart.

         8.6 ENTIRE  AGREEMENT;  NO THIRD PARTY  BENEFICIARIES.  This  Agreement
(together  with  the  Confidentiality  Agreement  and any  other  documents  and
instruments  referred to herein) constitutes the entire agreement and supersedes
all prior  agreements  and  understandings,  both written and oral,  between the
parties hereto with respect to the subject matter hereof.  This Agreement  shall
be binding  upon and inure  solely to the  benefit of each  party  hereto,  and,
except as provided in Section 5.5 and Section 5.10,  nothing in this  Agreement,
express or implied,  is intended  to or shall  confer upon any other  Person any
other right,  benefit or remedy of any nature  whatsoever  under or by reason of
this Agreement.

         8.7 GOVERNING  LAW. This  Agreement  shall be governed and construed in
accordance with the laws of the State of Delaware,  without giving effect to the
principles of conflicts of law thereof.

         8.8 ASSIGNMENT. Neither this Agreement nor any of the rights, interests
or obligations hereunder shall be assigned by any of the parties hereto (whether
by operation of law or otherwise) without the prior written consent of the other
parties.  Any  assignment in violation of the foregoing  shall be null and void.
This Agreement will be binding upon,  inure to the benefit of and be enforceable
by the parties hereto and their respective successors and permitted assigns.

                                      A-40
<PAGE>

         8.9 EFFECTIVENESS. This Agreement shall not become effective until such
time as this  Agreement  has been  executed and delivered by each of the parties
thereto.

         8.10 REFERENCE; NO WAIVER. Any reference in this Agreement to the "date
hereof,"  the  "date  of this  Agreement"  or the  "date  of  execution  of this
Agreement"  shall be deemed to refer to March 2, 1999,  the date of the Original
Merger  Agreement,  but any  reference to the "date of this Amended and Restated
Agreement"  or the "date of execution  of this  Amended and Restated  Agreement"
shall refer to the date first written above. The parties' execution and delivery
of this Agreement shall not constitute a waiver of any rights that either of the
parties hereto may have by reason of any event, condition,  misrepresentation or
breach of covenant of the Original Merger Agreement having occurred prior to the
date of execution and delivery of this Agreement  whether or not known to any or
all of the parties hereto.

               [The Remainder Of This Page Is Intentionally Blank]


                                      A-41
<PAGE>




         In witness  whereof,  the parties  hereto have caused this  Amended and
Restated Agreement and Plan of Merger to be signed by their respective  officers
thereunto duly authorized as of March 24, 1999.

                                         NEWCO:

                                         YANKEE ACQUISITION CORP.

                                         By:              /s/ Paul B. Queally
                                                          -------------------

                                                             Paul B. Queally
                                                             President

                                         COMPANY:

                                         CONCENTRA MANAGED CARE, INC.

                                         By:                /s/ Daniel J. Thomas
                                                            --------------------

                                                             Daniel J. Thomas
                                                             President and Chief
                                                             Executive Officer


                                      A-42
<PAGE>
                                                                     APPENDIX B

                   [LETTERHEAD OF BT ALEX. BROWN INCORPORATED]


                                  March 2, 1999

Board of Directors and
  Special Committee of the Board of Directors
Concentra Managed Care, Inc.
312 Union Wharf

Boston, Massachusetts 02105

Members of the Board and Special Committee:

         BT Alex. Brown  Incorporated ("BT Alex.  Brown") has acted as financial
advisor to Concentra  Managed Care,  Inc.  ("Concentra")  in connection with the
proposed  transaction  involving Concentra and Welsh,  Carson,  Anderson & Stowe
VIII, L.P. ("Welsh Carson") pursuant to the Agreement and Plan of Merger,  dated
as of March 2, 1999 (the "Merger Agreement"),  between Yankee Acquisition Corp.,
a wholly  owned  subsidiary  of Welsh Carson  ("Newco"),  and  Concentra,  which
provides,  among other things,  for the merger of Newco with and into  Concentra
(the "Merger").  As set forth more fully in the Merger Agreement, as a result of
the Merger,  each  outstanding  share of the common  stock,  par value $0.01 per
share, of Concentra (the "Concentra Common Stock") will be converted into either
(i) the right to retain,  at the  election of the holder  thereof,  one share of
Concentra Common Stock (the "Stock  Consideration") or (ii) the right to receive
$16.50  in  cash  (the  "Cash   Consideration"  and,  together  with  the  Stock
Consideration,  the  "Merger  Consideration"),   subject  to  certain  proration
procedures  (as to which we express no  opinion)  more  fully  specified  in the
Merger  Agreement.  The Merger  Agreement  provides that the aggregate number of
shares of Concentra Common Stock to be converted into the Stock Consideration at
the effective time of the Merger will be 1,854,500. The Merger Agreement further
provides  for the  possible  restructuring  of the  Merger  in order to  achieve
recapitalization  accounting  treatment  as a  merger  in  which  each  share of
Concentra Common Stock  outstanding  immediately  prior to the effective time of
the  Merger  would  be  converted  into  the  right  to  receive  only  the Cash
Consideration.

         You have requested BT Alex. Brown's opinion as to the fairness,  from a
financial point of view, of the Merger Consideration to the holders of Concentra
Common Stock (other than Welsh Carson or its affiliates).




                                      B-1
<PAGE>

Board of Directors and
  Special Committee of the Board of Directors
Concentra Managed Care, Inc.
March 2, 1999
Page 2

         In  connection  with BT Alex.  Brown's  role as  financial  advisor  to
Concentra,  and in arriving at its opinion,  BT Alex. Brown has reviewed certain
publicly  available  financial and other  information  concerning  Concentra and
certain internal analyses and other  information  furnished to or discussed with
it by Concentra and its advisors.  BT Alex. Brown has also held discussions with
members of the senior  management  of Concentra  and Welsh Carson  regarding the
business  and  prospects  of  Concentra.  In  addition,  BT Alex.  Brown has (i)
reviewed the reported  prices and trading  activity for Concentra  Common Stock,
(ii) compared certain financial and stock market  information for Concentra with
similar  information for certain other  companies whose  securities are publicly
traded,   (iii)  reviewed  the  financial   terms  of  certain  recent  business
combinations  which it deemed  comparable in whole or in part, (iv) reviewed the
terms of the Merger Agreement, and (v) performed such other studies and analyses
and considered such other factors as it deemed  appropriate.  In connection with
its engagement,  BT Alex. Brown was authorized to approach, and held discussions
with,  certain third parties to solicit  indications of interest with respect to
the acquisition of Concentra.

         BT  Alex.  Brown  has  not  assumed   responsibility   for  independent
verification of, and has not independently  verified,  any information,  whether
publicly  available or furnished  to it,  concerning  Concentra or the pro forma
company, including, without limitation, any financial information,  forecasts or
projections  considered  in  connection  with  the  rendering  of  its  opinion.
Accordingly,  for purposes of its opinion, BT Alex. Brown has assumed and relied
upon the accuracy and  completeness of all such  information and BT Alex.  Brown
has not conducted a physical  inspection of any of the properties or assets, and
has not prepared or obtained any  independent  evaluation or appraisal of any of
the assets or liabilities, of Concentra. With respect to the financial forecasts
and projections  made available to BT Alex.  Brown and used in its analyses,  BT
Alex.  Brown  has  assumed  that they have  been  prepared  on bases  reflecting
reasonable  estimates  and  judgments  as to the  matters  covered  thereby.  In
rendering its opinion, BT Alex. Brown expresses no view as to the reasonableness
of such forecasts and projections or the assumptions on which they are based. BT
Alex.  Brown's  opinion is  necessarily  based upon  economic,  market and other
conditions as in effect on, and the information  made available to it as of, the
date hereof.

         For purposes of rendering its opinion, BT Alex. Brown has assumed that,
in all respects material to its analysis,  the representations and warranties of
Concentra  and Newco  contained  in the Merger  Agreement  are true and correct,
Concentra and Newco will each perform all of the covenants and  agreements to be
performed by it under the Merger Agreement and all conditions to the obligations
of each of  Concentra  and Newco to  consummate  the  Merger  will be  satisfied
without any waiver  thereof.  BT Alex.  Brown has also assumed that all material
governmental,  regulatory or other approvals and consents required in connection
with the consummation of the Merger will be obtained and that in connection with
obtaining any necessary governmental, regu-

                                      B-2
<PAGE>

Board of Directors and
  Special Committee of the Board of Directors
Concentra Managed Care, Inc.
March 2, 1999
Page 3

latory or other  approvals and consents,  or any  amendments,  modifications  or
waivers to any  agreements,  instruments or orders to which either  Concentra or
Newco  is a party  or is  subject  or by  which  it is  bound,  no  limitations,
restrictions  or  conditions  will be imposed or  amendments,  modifications  or
waivers  made  that  would  have a  material  adverse  effect  on  Concentra  or
materially  reduce the  contemplated  benefits  of the Merger to  Concentra.  In
addition,  you have informed BT Alex.  Brown,  and  accordingly  for purposes of
rendering  its  opinion BT Alex.  Brown has  assumed,  that the  Merger  will be
recorded as a recapitalization for financial reporting purposes.  BT Alex. Brown
is  expressing  no opinion as to the price at which the  Concentra  Common Stock
will trade at any time.

         This opinion is addressed to, and for the use and benefit of, the Board
of  Directors  and the Special  Committee of the Board of Directors of Concentra
and is not a  recommendation  to  any  stockholder  as to  the  form  of  Merger
Consideration to be elected by such  stockholder or how such stockholder  should
vote with respect to matters  relating to the proposed  Merger.  This opinion is
limited  to  the  fairness,  from a  financial  point  of  view,  of the  Merger
Consideration  to the holders of Concentra Common Stock (other than Welsh Carson
or its affiliates),  and BT Alex. Brown expresses no opinion as to the merits of
the underlying decision by Concentra to engage in the Merger.

         BT Alex. Brown, as a customary part of its investment banking business,
is engaged in the  valuation of  businesses  and their  securities in connection
with mergers and acquisitions,  negotiated underwritings, private placements and
valuations for estate,  corporate and other purposes. We have acted as financial
advisor to  Concentra in  connection  with the Merger and will receive a fee for
our services, a significant portion of which is contingent upon the consummation
of the Merger and a portion of which is payable upon  delivery of this  opinion.
BT Alex. Brown and its affiliates have in the past provided  financial  services
to Concentra  and Welsh  Carson  unrelated  to the  proposed  Merger,  for which
services BT Alex. Brown and its affiliates have received compensation.  BT Alex.
Brown  maintains a market in  Concentra  Common  Stock and  regularly  publishes
research reports  regarding the businesses and securities of Concentra and other
publicly traded companies in the healthcare industry.  In the ordinary course of
business,  BT Alex.  Brown and its  affiliates  may  actively  trade or hold the
securities  and other  instruments  and  obligations  of Concentra for their own
account and for the accounts of customers and, accordingly, may at any time hold
a long or short position in such securities, instruments or obligations.


                                      B-3
<PAGE>

         Based upon and subject to the foregoing, it is BT Alex. Brown's opinion
that, as of the date of this letter,  the Merger  Consideration  is fair, from a
financial  point of view,  to the holders of Concentra  Common Stock (other than
Welsh Carson or its affiliates).

                                               Very truly yours,

                                               BT ALEX. BROWN INCORPORATED




                                      B-4

<PAGE>

                                                                     APPENDIX C

               SECTION 262 OF THE DELAWARE GENERAL CORPORATION LAW

SS. 262. APPRAISAL RIGHTS.

         (a) Any  stockholder of a corporation of this State who holds shares of
stock on the date of the making of a demand  pursuant to subsection  (d) of this
section with respect to such shares,  who continuously holds such shares through
the effective date of the merger or  consolidation,  who has otherwise  complied
with  subsection  (d) of this section and who has neither  voted in favor of the
merger or consolidation  nor consented  thereto in writing pursuant to ss.228 of
this title  shall be entitled  to an  appraisal  by the Court of Chancery of the
fair  value  of the  stockholder's  shares  of  stock  under  the  circumstances
described in subsections  (b) and (c) of this section.  As used in this section,
the word "stockholder"  means a holder of record of stock in a stock corporation
and also a member of record of a nonstock  corporation;  the words  "stock"  and
"share"  mean and  include  what is  ordinarily  meant by those  words  and also
membership or membership interest of a member of a nonstock corporation; and the
words  "depository  receipt"  mean a  receipt  or other  instrument  issued by a
depository representing an interest in one or more shares, or fractions thereof,
solely of stock of a corporation, which stock is deposited with the depository.

         (b) Appraisal  rights shall be available for the shares of any class or
series of stock of a constituent  corporation in a merger or consolidation to be
effected  pursuant to ss.251 (other than a merger effected pursuant to ss.251(g)
of this title), ss.252, ss.254, ss.257, ss.258, ss.263 or ss.264 of this title:

                  (1)  Provided,  however,  that no appraisal  rights under this
         section  shall be  available  for the  shares of any class or series of
         stock, which stock, or depository  receipts in respect thereof,  at the
         record date fixed to  determine  the  stockholders  entitled to receive
         notice of and to vote at the  meeting of  stockholders  to act upon the
         agreement  of merger or  consolidation,  were  either  (i)  listed on a
         national  securities exchange or designated as a national market system
         security on an interdealer quotation system by the National Association
         of Securities  Dealers,  Inc. or (ii) held of record by more than 2,000
         holders;  and  further  provided  that no  appraisal  rights  shall  be
         available  for any  shares  of  stock  of the  constituent  corporation
         surviving a merger if the merger did not require for its  approval  the
         vote of the  stockholders  of the surviving  corporation as provided in
         subsection (f) of ss.251 of this title.

                  (2)   Notwithstanding   paragraph  (1)  of  this   subsection,
         appraisal  rights under this section  shall be available for the shares
         of any  class or series of stock of a  constituent  corporation  if the
         holders  thereof are required by the terms of an agreement of merger or
         consolidation pursuant to ss.ss.251, 252, 254, 257, 258, 263 and 264 of
         this title to accept for such stock anything except:

                                      C-1
<PAGE>

                      a.  Shares  of  stock  of  the  corporation  surviving  or
                  resulting  from such merger or  consolidation,  or  depository
                  receipts in respect thereof;

                      b. Shares of stock of any other corporation, or depository
                  receipts  in  respect  thereof,  which  shares  of  stock  (or
                  depository receipts in respect thereof) or depository receipts
                  at the effective date of the merger or  consolidation  will be
                  either listed on a national  securities exchange or designated
                  as  a  national  market  system  security  on  an  interdealer
                  quotation  system by the National  Association  of  Securities
                  Dealers, Inc. or held of record by more than 2,000 holders;

                      c.  Cash  in  lieu  of  fractional  shares  or  fractional
                  depository  receipts described in the foregoing  subparagraphs
                  a. and b. of this paragraph; or

                      d. Any  combination  of the  shares of  stock,  depository
                  receipts and cash in lieu of  fractional  shares or fractional
                  depository  receipts described in the foregoing  subparagraphs
                  a., b. and c. of this paragraph.

                  (3) In the  event all of the  stock of a  subsidiary  Delaware
         corporation  party to a merger  effected  under ss.253 of this title is
         not owned by the parent  corporation  immediately  prior to the merger,
         appraisal  rights shall be available  for the shares of the  subsidiary
         Delaware corporation.

         (c) Any  corporation  may provide in its  certificate of  incorporation
that  appraisal  rights under this section  shall be available for the shares of
any class or series of its stock as a result of an amendment to its  certificate
of  incorporation,  any merger or  consolidation  in which the  corporation is a
constituent corporation or the sale of all or substantially all of the assets of
the corporation.  If the certificate of incorporation contains such a provision,
the procedures of this section, including those set forth in subsections (d) and
(e) of this section, shall apply as nearly as is practicable.

         (d) Appraisal rights shall be perfected as follows:

                  (1) If a proposed merger or consolidation  for which appraisal
         rights are provided  under this section is to be submitted for approval
         at a meeting of stockholders,  the  corporation,  not less than 20 days
         prior to the  meeting,  shall notify each of its  stockholders  who was
         such on the record  date for such  meeting  with  respect to shares for
         which appraisal rights are available pursuant to subsections (b) or (c)
         hereof that appraisal rights are available for any or all of the shares
         of the  constituent  corporations,  and shall  include in such notice a
         copy of this section. Each stockholder electing to demand the appraisal
         of such stockholder's  shares shall deliver to the corporation,  before
         the taking of the vote on the merger or consolidation, a written demand
         for  appraisal  of  such  stockholder's  shares.  Such  demand  will be
         sufficient if it reasonably  informs the corporation of the identity of
         the stockholder and that the stockholder  intends thereby to demand the
         appraisal  of such  stockholder's  shares.  A proxy or vote against the
         merger  or  consolidation   shall  not  consti-

                                      C-2
<PAGE>

         tute  such a demand. A stockholder electing to take such action must do
         so by  a separate  written  demand as herein  provided.  Within 10 days
         after  the  effective  date  of  such  merger  or  consolidation,  the
         surviving or resulting   corporation  shall notify each  stockholder of
         each constituent corporation  who has complied with this subsection and
         has not voted in favor of or  consented to the merger or  consolidation
         of the date that the merger or  consolidation has become effective; or

                  (2) If the merger or  consolidation  was approved  pursuant to
         ss.228 or ss.253 of this title,  each constituent  corporation,  either
         before the effective date of the merger or  consolidation or within ten
         days  thereafter,  shall  notify  each of the  holders  of any class or
         series of stock of such  constituent  corporation  who are  entitled to
         appraisal  rights of the  approval of the merger or  consolidation  and
         that appraisal rights are available for any or all shares of such class
         or series of stock of such constituent  corporation,  and shall include
         in such notice a copy of this section;  provided that, if the notice is
         given on or after the  effective  date of the merger or  consolidation,
         such notice shall be given by the surviving or resulting corporation to
         all such  holders  of any  class or  series  of stock of a  constituent
         corporation  that are  entitled to appraisal  rights.  Such notice may,
         and,  if  given  on or  after  the  effective  date  of the  merger  or
         consolidation,  shall,  also notify such  stockholders of the effective
         date of the  merger  or  consolidation.  Any  stockholder  entitled  to
         appraisal  rights may, within 20 days after the date of mailing of such
         notice,  demand in writing from the surviving or resulting  corporation
         the appraisal of such holder's  shares.  Such demand will be sufficient
         if it  reasonably  informs  the  corporation  of  the  identity  of the
         stockholder  and that the  stockholder  intends  thereby  to demand the
         appraisal  of such  holder's  shares.  If such  notice  did not  notify
         stockholders  of the  effective  date of the  merger or  consolidation,
         either (i) each such constituent corporation shall send a second notice
         before the effective date of the merger or consolidation notifying each
         of the  holders  of any class or  series  of stock of such  constituent
         corporation that are entitled to appraisal rights of the effective date
         of the  merger or  consolidation  or (ii) the  surviving  or  resulting
         corporation  shall send such a second  notice to all such holders on or
         within 10 days after such effective date;  provided,  however,  that if
         such second  notice is sent more than 20 days  following the sending of
         the  first  notice,  such  second  notice  need  only  be  sent to each
         stockholder  who is entitled to  appraisal  rights and who has demanded
         appraisal of such holder's shares in accordance  with this  subsection.
         An affidavit of the secretary or assistant secretary or of the transfer
         agent of the  corporation  that is required to give either  notice that
         such notice has been given  shall,  in the  absence of fraud,  be prima
         facie evidence of the facts stated therein. For purposes of determining
         the  stockholders  entitled to receive either notice,  each constituent
         corporation  may fix, in advance,  a record date that shall be not more
         than 10 days prior to the date the notice is given,  provided,  that if
         the  notice is given on or after the  effective  date of the  merger or
         consolidation,  the record  date shall be such  effective  date.  If no
         record  date is fixed and the  notice is given  prior to the  effective
         date,  the record  date shall be the close of  business on the day next
         preceding the day on which the notice is given.

                                      C-3
<PAGE>



         (e)  Within  120  days  after  the  effective  date  of the  merger  or
consolidation, the surviving or resulting corporation or any stockholder who has
complied with  subsections  (a) and (d) hereof and who is otherwise  entitled to
appraisal  rights,  may file a petition  in the Court of  Chancery  demanding  a
determination   of  the   value  of  the   stock   of  all  such   stockholders.
Notwithstanding  the  foregoing,  at any time within 60 days after the effective
date of the merger or  consolidation,  any  stockholder  shall have the right to
withdraw such stockholder's demand for appraisal and to accept the terms offered
upon the merger or  consolidation.  Within 120 days after the effective  date of
the  merger  or  consolidation,  any  stockholder  who  has  complied  with  the
requirements of subsections (a) and (d) hereof,  upon written request,  shall be
entitled to receive from the corporation  surviving the merger or resulting from
the  consolidation a statement  setting forth the aggregate number of shares not
voted in favor of the merger or consolidation  and with respect to which demands
for appraisal  have been  received and the  aggregate  number of holders of such
shares. Such written statement shall be mailed to the stockholder within 10 days
after such stockholder's written request for such a statement is received by the
surviving or resulting  corporation  or within 10 days after  expiration  of the
period for  delivery  of demands  for  appraisal  under  subsection  (d) hereof,
whichever is later.

         (f) Upon the filing of any such petition by a stockholder, service of a
copy thereof  shall be made upon the surviving or resulting  corporation,  which
shall  within 20 days after such  service  file in the office of the Register in
Chancery in which the petition was filed a duly  verified  list  containing  the
names and  addresses of all  stockholders  who have  demanded  payment for their
shares and with whom  agreements  as to the value of their  shares have not been
reached by the  surviving or  resulting  corporation.  If the petition  shall be
filed  by  the  surviving  or  resulting  corporation,  the  petition  shall  be
accompanied  by such a duly  verified  list.  The  Register in  Chancery,  if so
ordered by the  Court,  shall  give  notice of the time and place  fixed for the
hearing of such  petition by  registered  or certified  mail to the surviving or
resulting corporation and to the stockholders shown on the list at the addresses
therein  stated.  Such notice shall also be given by 1 or more  publications  at
least  1  week  before  the  day of  the  hearing,  in a  newspaper  of  general
circulation published in the City of Wilmington, Delaware or such publication as
the Court deems  advisable.  The forms of the notices by mail and by publication
shall be  approved  by the Court,  and the costs  thereof  shall be borne by the
surviving or resulting corporation.

         (g) At the  hearing on such  petition,  the Court shall  determine  the
stockholders who have complied with this section and who have become entitled to
appraisal  rights.  The Court may require the  stockholders who have demanded an
appraisal for their shares and who hold stock  represented  by  certificates  to
submit  their  certificates  of stock to the  Register in Chancery  for notation
thereon of the pendency of the  appraisal  proceedings;  and if any  stockholder
fails to comply with such direction, the Court may dismiss the proceedings as to
such stockholder.

         (h) After  determining the stockholders  entitled to an appraisal,  the

Court shall appraise the shares,  determining  their fair value exclusive of any
element of value arising from the accomplishment or expectation of the merger or
consolidation,  together  with a fair rate of interest,  if any, to be paid upon
the amount  determined to be the fair value. In determining such fair value, the
Court

                                      C-4
<PAGE>

shall take into account all relevant  factors.  In determining  the fair rate of
interest,  the Court may consider all relevant  factors,  including  the rate of
interest which the surviving or resulting  corporation  would have had to pay to
borrow money  during the pendency of the  proceeding.  Upon  application  by the
surviving or resulting corporation or by any stockholder entitled to participate
in the appraisal proceeding, the Court may, in its discretion,  permit discovery
or other pretrial  proceedings and may proceed to trial upon the appraisal prior
to the final  determination  of the  stockholder  entitled to an appraisal.  Any
stockholder  whose name appears on the list filed by the  surviving or resulting
corporation  pursuant to  subsection  (f) of this section and who has  submitted
such stockholder's certificates of stock to the Register in Chancery, if such is
required,  may  participate  fully  in  all  proceedings  until  it  is  finally
determined that such  stockholder is not entitled to appraisal rights under this
section.

         (i) The Court shall direct the payment of the fair value of the shares,
together with interest, if any, by the surviving or resulting corporation to the
stockholders entitled thereto.  Interest may be simple or compound, as the Court
may direct.  Payment shall be so made to each such  stockholder,  in the case of
holders of  uncertificated  stock  forthwith,  and the case of holders of shares
represented  by  certificates  upon  the  surrender  to the  corporation  of the
certificates  representing  such stock.  The  Court's  decree may be enforced as
other decrees in the Court of Chancery may be enforced,  whether such  surviving
or resulting corporation be a corporation of this State or of any state.

         (j) The  costs of the  proceeding  may be  determined  by the Court and
taxed upon the parties as the Court deems equitable in the  circumstances.  Upon
application  of a  stockholder,  the Court  may  order  all or a portion  of the
expenses   incurred  by  any   stockholder  in  connection  with  the  appraisal
proceeding,  including,  without limitation,  reasonable attorney's fees and the
fees and  expenses of experts,  to be charged pro rata  against the value of all
the shares entitled to an appraisal.

         (k) From and after the effective  date of the merger or  consolidation,
no stockholder who has demanded  appraisal  rights as provided in subsection (d)
of this  section  shall be  entitled  to vote such  stock for any  purpose or to
receive  payment  of  dividends  or other  distributions  on the  stock  (except
dividends or other  distributions  payable to  stockholders  of record at a date
which is prior to the effective date of the merger or consolidation);  provided,
however,  that if no petition  for an  appraisal  shall be filed within the time
provided in subsection (e) of this section, or if such stockholder shall deliver
to  the  surviving  or  resulting  corporation  a  written  withdrawal  of  such
stockholder's  demand  for an  appraisal  and an  acceptance  of the  merger  or
consolidation,  either within 60 days after the effective  date of the merger or
consolidation  as provided in subsection (e) of this section or thereafter  with
the written approval of the  corporation,  then the right of such stockholder to
an appraisal shall cease. Notwithstanding the foregoing, no appraisal proceeding
in the Court of Chancery  shall be dismissed as to any  stockholder  without the
approval of the Court,  and such approval may be conditioned  upon such terms as
the Court deems just.

         (l) The shares of the surviving or resulting  corporation  to which the
shares  of such  objecting  stockholders  would  have  been  converted  had they
assented to the merger or consolidation  shall have the status of authorized and
unissued shares of the surviving or resulting corporation.

                                      C-5


<PAGE>

CONCENTEA
MANAGED CARE, INC.


Message to our Customers from CEO Dan Thomas

Dear CONCENTRA Customer,

On March 3, 1999,  Concentra Managed Care, Inc. announced our agreement to merge
with Welsh.  Carson,  Anderson & Stows, a private  investment  firm based in New
York. As a result of this merger, Welsh Carson will acquire all or substantially
all of the remaining  Concentra  shares  outstanding.  We are very excited about
Concentra's continued operation as an independent company under its current name
and management.

Over the past several  months,  we have been  evaluating  various aspects of our
business  to identify  ways in which we may  continue to meet the demands of and
improve the delivery of our services to our  customers.  The Welsh Carson merger
is a crucial step in effecting  the positive  changes that we know are possible.
This move will help us to meet our strategic objectives: to continue to maximize
our  value to  customers,  to  increase  the  visibility  of early  intervention
programs, to expand our technology and outcome development  initiatives,  and to
increase the depth and breadth of our health services and network systems. It is
our intention to capitalize on this opportunity to continue to integrate systems
and products related to our past mergers, and to increase partnership activities
with our customers to enhance the value of our services.

It is  important  for  you to know  that  Welsh  Carson  is no  stranger  to the
healthcare industry or to our Company.  The Concentra management team is already
acquainted   with  Welsh  Carson  through  both  personal   experience  and  our
professional  backgrounds.  This  familiarity  with  the  firm  gives  me  great
confidence  that our new  relationship  will offer us the  opportunity to invest
more in our capabilities, With over $7 billion in private capital and a long and
successful track record of investing in both healthcare and information services
companies,  Welsh  Carson's  experience  and industry focus make them an optimal
partner in helping Concentra  maintain the highest level of care and quality for
our  patients  and  customers.  Welsh  Carson  will also  improve our ability to
respond to the growing need of our customers for better outcome reporting.

I am confident  that this new  relationship  will allow us to continue doing the
right  things to enhance our  attractiveness  to our  customers  as an effective
partner  and as a quality  service  provider.  As always,  our core  commitments
remain  the same:  customer  service,  comprehensive  communication.  technology
investment and integration of systems and services. Our customer base has played
an important role in helping  Concentra build a strong  foundation and excellent
reputation as the leader in our  industry.  I want to thank you  personally  for
your contributions,  which have brought Concentra to this important threshold. I
look  forward  to the  great  opportunities  ahead for our  company  and for our
customers  as we  successfully  move  forward as a leader  with an even  greater
ability to effectively service the needs of our customers.

Best regards,

/s/ Daniel J. Thomas
- --------------------
Daniel J. Thomas
President and Chief Executive Officer



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