MAYFIELD VII
SC 13G/A, 1998-02-17
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<PAGE>   1

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  ------------

                                  SCHEDULE 13G
                                 (Rule 13d-102)

             INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT
             TO RULES 13d-1(b) AND (c) AND AMENDMENTS THERETO FILED
                              PURSUANT TO 13d-2(b)
                               (Amendment No. 2)(1)


                        Millennium Pharmaceuticals, Inc.
                                (Name of Issuer)


                    Common Stock, par value $.001 per share
                         (Title of Class of Securities)


                                    59990210
                                 (CUSIP Number)


(1) The remainder of this cover page shall be filled out for a reporting
person's initial filing on this form with respect to the subject class of
securities, and for any subsequent amendment containing information which would
alter the disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the Securities Exchange Act of
1934 ("Act") or otherwise subject to the liabilities of that section of the Act
but shall be subject to all other provisions of the Act (however, see the
Notes).

<PAGE>   2

CUSIP NO. 59990210                      13G              PAGE   2  OF   17 PAGES
          --------------------                                -----   -----

  (1)     NAME OF REPORTING PERSON
          S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

          MAYFIELD VII, A CALIFORNIA LIMITED PARTNERSHIP
          94-3167809
          ---------------------------------------------------------------------

  (2)     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*         (a)   [   ]
                                                                    (b)   [ X ]

          --------------------------------------------------------------------- 

  (3)     SEC USE ONLY

          ---------------------------------------------------------------------

  (4)     CITIZENSHIP OR PLACE OF ORGANIZATION

          CALIFORNIA
          ---------------------------------------------------------------------

                       (5)     SOLE VOTING POWER
  NUMBER OF                          -0-
   SHARES              --------------------------------------------------------
 BENEFICIALLY          (6)     SHARED VOTING POWER
  OWNED BY                           -0-
    EACH               --------------------------------------------------------
  REPORTING            (7)     SOLE DISPOSITIVE POWER
 PERSON WITH                         -0-
                       --------------------------------------------------------
                       (8)     SHARED DISPOSITIVE POWER
                                     -0-
                       --------------------------------------------------------

  (9)     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON         

               -0-
          ---------------------------------------------------------------------

 (10)     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN
          SHARES                                                          [   ]

          ---------------------------------------------------------------------

 (11)     PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

               0%
          ---------------------------------------------------------------------

 (12)     TYPE OF REPORTING PERSON

               PN
          ---------------------------------------------------------------------

<PAGE>   3
CUSIP NO. 59990210                      13G              PAGE   3  OF   17 PAGES
          --------------------                                -----   -----

  (1)     NAME OF REPORTING PERSON
          S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

          MAYFIELD VII MANAGEMENT PARTNERS, A CALIFORNIA LIMITED PARTNERSHIP
          94-3167811
          ---------------------------------------------------------------------

  (2)     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*         (a)   [   ]
                                                                    (b)   [ X ]

          --------------------------------------------------------------------- 

  (3)     SEC USE ONLY

          ---------------------------------------------------------------------

  (4)     CITIZENSHIP OR PLACE OF ORGANIZATION

          CALIFORNIA
          ---------------------------------------------------------------------

                       (5)     SOLE VOTING POWER
  NUMBER OF                          -0-
   SHARES              --------------------------------------------------------
 BENEFICIALLY          (6)     SHARED VOTING POWER
  OWNED BY                           -0-
    EACH               --------------------------------------------------------
  REPORTING            (7)     SOLE DISPOSITIVE POWER
 PERSON WITH                         -0-
                       --------------------------------------------------------
                       (8)     SHARED DISPOSITIVE POWER
                                     -0-
                       --------------------------------------------------------

  (9)     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON         

               -0-
          ---------------------------------------------------------------------

 (10)     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN
          SHARES                                                          [   ]

          ---------------------------------------------------------------------

 (11)     PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

               0%
          ---------------------------------------------------------------------

 (12)     TYPE OF REPORTING PERSON

               PN
          ---------------------------------------------------------------------

<PAGE>   4
CUSIP NO. 59990210                      13G              PAGE   4  OF   17 PAGES
          --------------------                                -----   -----

  (1)     NAME OF REPORTING PERSON
          S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

          MAYFIELD ASSOCIATES FUND II, A CALIFORNIA LIMITED PARTNERSHIP
          94-3191510
          ---------------------------------------------------------------------

  (2)     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*         (a)   [   ]
                                                                    (b)   [ X ]

          --------------------------------------------------------------------- 

  (3)     SEC USE ONLY

          ---------------------------------------------------------------------

  (4)     CITIZENSHIP OR PLACE OF ORGANIZATION

          CALIFORNIA
          ---------------------------------------------------------------------

                       (5)     SOLE VOTING POWER
  NUMBER OF                          -0-
   SHARES              --------------------------------------------------------
 BENEFICIALLY          (6)     SHARED VOTING POWER
  OWNED BY                           -0-
    EACH               --------------------------------------------------------
  REPORTING            (7)     SOLE DISPOSITIVE POWER
 PERSON WITH                         -0-
                       --------------------------------------------------------
                       (8)     SHARED DISPOSITIVE POWER
                                     -0-
                       --------------------------------------------------------

  (9)     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON         

               -0-
          ---------------------------------------------------------------------

 (10)     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN
          SHARES                                                          [   ]

          ---------------------------------------------------------------------

 (11)     PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

               0%
          ---------------------------------------------------------------------

 (12)     TYPE OF REPORTING PERSON

               PN
          ---------------------------------------------------------------------

<PAGE>   5

CUSIP NO. 59990210                      13G              PAGE   5  OF   17 PAGES
          --------------------                                -----   -----

  (1)     NAMES OF REPORTING PERSONS
          S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS

          MAYFIELD MEDICAL PARTNERS 1992, A CALIFORNIA LIMITED PARTNERSHIP
          94-3170955
          ---------------------------------------------------------------------

  (2)     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*         (a)   [   ]
                                                                    (b)   [ X ]

          --------------------------------------------------------------------- 

  (3)     SEC USE ONLY

          ---------------------------------------------------------------------

  (4)     CITIZENSHIP OR PLACE OF ORGANIZATION

          CALIFORNIA
          ---------------------------------------------------------------------

                       (5)     SOLE VOTING POWER
  NUMBER OF                          -0-
   SHARES              --------------------------------------------------------
 BENEFICIALLY          (6)     SHARED VOTING POWER
  OWNED BY                           -0-
    EACH               --------------------------------------------------------
  REPORTING            (7)     SOLE DISPOSITIVE POWER
 PERSON WITH                         -0-
                       --------------------------------------------------------
                       (8)     SHARED DISPOSITIVE POWER
                                     -0-
                       --------------------------------------------------------

  (9)     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON         

               -0-
          ---------------------------------------------------------------------

 (10)     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN
          SHARES                                                          [   ]

          ---------------------------------------------------------------------

 (11)     PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

               0%
          ---------------------------------------------------------------------

 (12)     TYPE OF REPORTING PERSON

               PN
          ---------------------------------------------------------------------

<PAGE>   6
CUSIP NO. 59990210                      13G              PAGE   6  OF   17 PAGES
          --------------------                                -----   -----

  (1)     NAME OF REPORTING PERSON
          S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

          YOGEN K. DALAL
          SOCIAL SECURITY NUMBER: ###-##-####
          ---------------------------------------------------------------------

  (2)     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*         (a)   [   ]
                                                                    (b)   [ X ]

          --------------------------------------------------------------------- 

  (3)     SEC USE ONLY

          ---------------------------------------------------------------------

  (4)     CITIZENSHIP OR PLACE OF ORGANIZATION

          U.S.
          ---------------------------------------------------------------------

                       (5)     SOLE VOTING POWER
  NUMBER OF                          44,688
   SHARES              --------------------------------------------------------
 BENEFICIALLY          (6)     SHARED VOTING POWER
  OWNED BY                           -0-
    EACH               --------------------------------------------------------
  REPORTING            (7)     SOLE DISPOSITIVE POWER
 PERSON WITH                         44,688
                       --------------------------------------------------------
                       (8)     SHARED DISPOSITIVE POWER
                                     -0-
                       --------------------------------------------------------

  (9)     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON         

               44,688
          ---------------------------------------------------------------------

 (10)     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN
          SHARES                                                          [   ]

          ---------------------------------------------------------------------

 (11)     PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

               LESS THAN 0.1%
          ---------------------------------------------------------------------

 (12)     TYPE OF REPORTING PERSON

               IN
          ---------------------------------------------------------------------

<PAGE>   7

CUSIP NO. 59990210                      13G              PAGE   7  OF   17 PAGES
          --------------------                                -----   -----

  (1)     NAME OF REPORTING PERSON
          S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

          F. GIBSON MYERS, JR.
          SOCIAL SECURITY NUMBER: ###-##-####
          ---------------------------------------------------------------------

  (2)     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*         (a)   [   ]
                                                                    (b)   [ X ]

          --------------------------------------------------------------------- 

  (3)     SEC USE ONLY

          ---------------------------------------------------------------------

  (4)     CITIZENSHIP OR PLACE OF ORGANIZATION

          U.S.
          ---------------------------------------------------------------------

                       (5)     SOLE VOTING POWER
  NUMBER OF                          70,842
   SHARES              --------------------------------------------------------
 BENEFICIALLY          (6)     SHARED VOTING POWER
  OWNED BY                           -0-
    EACH               --------------------------------------------------------
  REPORTING            (7)     SOLE DISPOSITIVE POWER
 PERSON WITH                         -0-
                       --------------------------------------------------------
                       (8)     SHARED DISPOSITIVE POWER
                                     70,842
                       --------------------------------------------------------

  (9)     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON         

               70,842
          ---------------------------------------------------------------------

 (10)     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN
          SHARES                                                          [   ]

          ---------------------------------------------------------------------

 (11)     PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

               LESS THAN 0.1%
          ---------------------------------------------------------------------

 (12)     TYPE OF REPORTING PERSON

               IN
          ---------------------------------------------------------------------

<PAGE>   8
CUSIP NO. 59990210                      13G              PAGE   8  OF   17 PAGES
          --------------------                                -----   -----

  (1)     NAME OF REPORTING PERSON
          S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

          KEVIN A. FONG
          SOCIAL SECURITY NUMBER: ###-##-####
          ---------------------------------------------------------------------

  (2)     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*         (a)   [   ]
                                                                    (b)   [ X ]

          --------------------------------------------------------------------- 

  (3)     SEC USE ONLY

          ---------------------------------------------------------------------

  (4)     CITIZENSHIP OR PLACE OF ORGANIZATION

          U.S.
          ---------------------------------------------------------------------

                       (5)     SOLE VOTING POWER
  NUMBER OF                          3,295
   SHARES              --------------------------------------------------------
 BENEFICIALLY          (6)     SHARED VOTING POWER
  OWNED BY                           -0-
    EACH               --------------------------------------------------------
  REPORTING            (7)     SOLE DISPOSITIVE POWER
 PERSON WITH                         3,295
                       --------------------------------------------------------
                       (8)     SHARED DISPOSITIVE POWER
                                     -0-
                       --------------------------------------------------------

  (9)     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON         

               3,295
          ---------------------------------------------------------------------

 (10)     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN
          SHARES                                                          [   ]

          ---------------------------------------------------------------------

 (11)     PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

               LESS THAN 0.1%
          ---------------------------------------------------------------------

 (12)     TYPE OF REPORTING PERSON

               IN
          ---------------------------------------------------------------------

<PAGE>   9
CUSIP NO. 59990210                      13G              PAGE   9  OF   17 PAGES
          --------------------                                -----   -----

  (1)     NAME OF REPORTING PERSON
          S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

          WILLIAM D. UNGER
          SOCIAL SECURITY NUMBER: ###-##-####
          ---------------------------------------------------------------------

  (2)     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*         (a)   [   ]
                                                                    (b)   [ X ]

          --------------------------------------------------------------------- 

  (3)     SEC USE ONLY

          ---------------------------------------------------------------------

  (4)     CITIZENSHIP OR PLACE OF ORGANIZATION

          U.S.
          ---------------------------------------------------------------------

                       (5)     SOLE VOTING POWER
  NUMBER OF                          47,248
   SHARES              --------------------------------------------------------
 BENEFICIALLY          (6)     SHARED VOTING POWER
  OWNED BY                           -0-
    EACH               --------------------------------------------------------
  REPORTING            (7)     SOLE DISPOSITIVE POWER
 PERSON WITH                         47,248
                       --------------------------------------------------------
                       (8)     SHARED DISPOSITIVE POWER
                                     -0-
                       --------------------------------------------------------

  (9)     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON         

               47,248
          ---------------------------------------------------------------------

 (10)     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN
          SHARES                                                          [   ]

          ---------------------------------------------------------------------

 (11)     PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

               LESS THAN 0.1%
          ---------------------------------------------------------------------

 (12)     TYPE OF REPORTING PERSON

               IN
          ---------------------------------------------------------------------

<PAGE>   10
CUSIP NO. 59990210                      13G              PAGE   10 OF  17  PAGES
          --------------------                                -----   -----

  (1)     NAME OF REPORTING PERSON
          S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

          WENDELL G. AUKEN
          SOCIAL SECURITY NUMBER: ###-##-####
          ---------------------------------------------------------------------

  (2)     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*         (a)   [   ]
                                                                    (b)   [ X ]

          --------------------------------------------------------------------- 

  (3)     SEC USE ONLY

          ---------------------------------------------------------------------

  (4)     CITIZENSHIP OR PLACE OF ORGANIZATION

          U.S.
          ---------------------------------------------------------------------

                       (5)     SOLE VOTING POWER
  NUMBER OF                          52,544
   SHARES              --------------------------------------------------------
 BENEFICIALLY          (6)     SHARED VOTING POWER
  OWNED BY                           -0-
    EACH               --------------------------------------------------------
  REPORTING            (7)     SOLE DISPOSITIVE POWER
 PERSON WITH                         -0-
                       --------------------------------------------------------
                       (8)     SHARED DISPOSITIVE POWER
                                     52,544
                       --------------------------------------------------------

  (9)     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON         

                52,544
          ---------------------------------------------------------------------

 (10)     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN
          SHARES                                                          [   ]

          ---------------------------------------------------------------------

 (11)     PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

               LESS THAN 0.1%
          ---------------------------------------------------------------------

 (12)     TYPE OF REPORTING PERSON

               IN
          ---------------------------------------------------------------------

<PAGE>   11
CUSIP NO. 59990210                      13G              PAGE   11 OF  17  PAGES
          --------------------                                -----   -----

  (1)     NAME OF REPORTING PERSON
          S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

          MICHAEL J. LEVINTHAL
          SOCIAL SECURITY NUMBER: ###-##-####
          ---------------------------------------------------------------------

  (2)     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*         (a)   [   ]
                                                                    (b)   [ X ]

          --------------------------------------------------------------------- 

  (3)     SEC USE ONLY

          ---------------------------------------------------------------------

  (4)     CITIZENSHIP OR PLACE OF ORGANIZATION

          U.S.
          ---------------------------------------------------------------------

                       (5)     SOLE VOTING POWER
  NUMBER OF                          52,544
   SHARES              --------------------------------------------------------
 BENEFICIALLY          (6)     SHARED VOTING POWER
  OWNED BY                           -0-
    EACH               --------------------------------------------------------
  REPORTING            (7)     SOLE DISPOSITIVE POWER
 PERSON WITH                         52,544
                       --------------------------------------------------------
                       (8)     SHARED DISPOSITIVE POWER
                                     -0-
                       --------------------------------------------------------

  (9)     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON         

               52,544
          ---------------------------------------------------------------------

 (10)     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN
          SHARES                                                          [   ]

          ---------------------------------------------------------------------

 (11)     PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

           LESS THAN 0.1%
          ---------------------------------------------------------------------

 (12)     TYPE OF REPORTING PERSON

               IN
          ---------------------------------------------------------------------

<PAGE>   12
CUSIP NO. 59990210                      13G              PAGE   12 OF  17  PAGES
          --------------------                                -----   -----

  (1)     NAME OF REPORTING PERSON
          S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

          A. GRANT HEIDRICH, III
          SOCIAL SECURITY NUMBER: ###-##-####
          ---------------------------------------------------------------------

  (2)     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*         (a)   [   ]
                                                                    (b)   [ X ]

          --------------------------------------------------------------------- 

  (3)     SEC USE ONLY

          ---------------------------------------------------------------------

  (4)     CITIZENSHIP OR PLACE OF ORGANIZATION

          U.S.
          ---------------------------------------------------------------------

                       (5)     SOLE VOTING POWER
  NUMBER OF                          86,444
   SHARES              --------------------------------------------------------
 BENEFICIALLY          (6)     SHARED VOTING POWER
  OWNED BY                           -0-
    EACH               --------------------------------------------------------
  REPORTING            (7)     SOLE DISPOSITIVE POWER
 PERSON WITH                         86,444
                       --------------------------------------------------------
                       (8)     SHARED DISPOSITIVE POWER
                                     -0-
                       --------------------------------------------------------

  (9)     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON         

               86,444
          ---------------------------------------------------------------------

 (10)     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN
          SHARES                                                          [   ]

          ---------------------------------------------------------------------

 (11)     PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

               LESS THAN 0.1%
          ---------------------------------------------------------------------

 (12)     TYPE OF REPORTING PERSON

               IN
          ---------------------------------------------------------------------

<PAGE>   13
ITEM 1.

        (a)    NAME OF ISSUER:

               Millennium Pharmaceuticals, Inc.

        (b)    ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES:

               640 Memorial Drive
               Cambridge, MA 02139

ITEM 2.

        (a)    NAME OF PERSONS FILING:

               Mayfield VII, a California Limited Partnership
               Mayfield VII Management Partners, a California Limited 
               Partnership
               Mayfield Associates Fund II, a California Limited Partnership
               Mayfield Medical Partners (1992), a California Partnership
               Yogen K. Dalal
               Kevin A. Fong
               Wendell G. Van Auken
               A. Grant Heidrich, III
               F. Gibson Myers, Jr.
               William D. Unger
               Michael J. Levinthal

        (b)    ADDRESS OF PRINCIPAL BUSINESS OFFICE:

               c/o The Mayfield Fund
               2800 Sand Hill Road
               Menlo Park, CA 94025

        (c)    CITIZENSHIP:

               The entities listed in Item 2(a) are California Limited
               Partnerships except for Mayfield Medical Partners (1992) which 
               is a California Partnership.

               The individuals listed in Item 2(a) are U.S. citizens.

        (d)    TITLE OF CLASS OF SECURITIES:

               Common Stock, par value $.001 per share.

        (e)    CUSIP NUMBER:

               59990210


                              Page 13 of 17 Pages.
<PAGE>   14

ITEM 3.        IF THIS STATEMENT IS FILED PURSUANT TO RULE 13d-1(b), OR 
               13d-2(b), CHECK WHETHER THE PERSON FILING IS A:

               Not applicable

ITEM 4.        OWNERSHIP

               The information regarding ownership as set forth in Items 5-9 of
               Pages 2-12 hereto, is hereby incorporated by reference.

ITEM 5.        OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS

               If this statement is being filed to report the fact that as of
               the date hereof the reporting person has ceased to be the
               beneficial owner of more than five percent of the class of
               securities, check the following [x].

ITEM 6.        OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON

               Not applicable.

ITEM 7.        IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH
               ACQUIRED THE SECURITY BEING REPORTED ON BY THE PARENT HOLDING
               COMPANY

               Not applicable.

ITEM 8.        IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP

               Not applicable.

ITEM 9.        NOTICE OF DISSOLUTION OF GROUP

               Not applicable.

ITEM 10.       CERTIFICATION

               Not applicable.



                              Page 14 of 17 Pages
<PAGE>   15

                                   SIGNATURES

               After reasonable inquiry and to the best of my knowledge and
belief, I certify that the information set forth in this statement is true,
complete and correct.

Date:  February 17, 1998
                                    MAYFIELD VII
                                    A California Limited Partnership

                                    By: /s/ George A. Pavlov
                                        ----------------------------------------
                                        George A. Pavlov, Authorized Signatory

                                    MAYFIELD VII MANAGEMENT PARTNERS
                                    A California Limited Partnership

                                    By: /s/ George A. Pavlov
                                        ----------------------------------------
                                        George A. Pavlov, Authorized Signatory

                                    MAYFIELD ASSOCIATES FUND II
                                    A California Limited Partnership

                                    By: /s/ George A. Pavlov
                                        ----------------------------------------
                                        George A. Pavlov, Authorized Signatory

                                    MAYFIELD MEDICAL PARTNERS (1992)
                                    A California Partnership

                                    By: /s/ George A. Pavlov
                                        ----------------------------------------
                                        George A. Pavlov, Authorized Signatory

                                    YOGEN K. DALAL

                                    By: /s/ George A. Pavlov
                                        ----------------------------------------
                                        George A. Pavlov, Attorney In Fact

                                    F. GIBSON MYERS, JR.

                                    By: /s/ George A. Pavlov
                                        ----------------------------------------
                                        George A. Pavlov, Attorney In Fact

                                    KEVIN A. FONG

                                    By: /s/ George A. Pavlov
                                        ----------------------------------------
                                        George A. Pavlov, Attorney In Fact


                              Page 15 of 17 Pages
<PAGE>   16

                                    WILLIAM D. UNGER

                                    By: /s/ George A. Pavlov
                                        ----------------------------------------
                                        George A. Pavlov, Attorney In Fact

                                    WENDELL G. VAN AUKEN

                                    By: /s/ George A. Pavlov
                                        ----------------------------------------
                                        George A. Pavlov, Attorney In Fact

                                    MICHAEL J. LEVINTHAL

                                    By: /s/ George A. Pavlov
                                        ----------------------------------------
                                        George A. Pavlov, Attorney In Fact

                                    A. GRANT HEIDRICH, III

                                    By: /s/ George A. Pavlov
                                        ----------------------------------------
                                        George A. Pavlov, Attorney In Fact


                              Page 16 of 17 Pages.
<PAGE>   17

                                    EXHIBITS

Exhibit 1-    "Statement Appointing Designated Filer and Authorized
              Signatory" is hereby incorporated by reference to Exhibit B to the
              Statement on Schedule 13G dated February 10, 1997.


                              Page 17 of 17 Pages


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