RITA MEDICAL SYSTEMS INC
S-1/A, EX-1.1, 2000-06-14
ELECTROMEDICAL & ELECTROTHERAPEUTIC APPARATUS
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          [Draft -- 6/9/00]

                                                                     EXHIBIT 1.1


                          RITA Medical Systems, Inc.

                              [       ] Shares/1/
                                 Common Stock
                               ($.001 par value)

                            Underwriting Agreement


          New York, New York
          , 2000

     Salomon Smith Barney Inc.
     FleetBoston Robertson Stephens Inc.

     As Representatives of the several Underwriters,
     c/o Salomon Smith Barney Inc.
     388 Greenwich Street
     New York, New York 10013


     Ladies and Gentlemen:

               RITA Medical Systems, Inc., a corporation organized under the
     laws of Delaware (the "Company"), proposes to sell to the several
     underwriters named in Schedule I hereto (the "Underwriters"), for whom you
     (the "Representatives") are acting as representatives, [            ]
     shares of Common Stock, $.001 par value ("Common Stock") of the Company
     (said shares to be issued and sold by the Company being hereinafter called
     the "Underwritten Securities").  The Company also proposes to grant to the
     Underwriters an option to purchase up to [            ] additional shares
     of Common Stock to cover over-allotments (the "Option Securities"; the
     Option Securities, together with the Underwritten Securities, being
     hereinafter called the "Securities").  To the extent there are no
     additional Underwriters listed on Schedule I other than you, the term
     Representatives as used herein shall mean you, as Underwriters, and the
     terms Representatives and Underwriters shall mean either the singular or
     plural as the context requires.  Certain terms used herein are defined in
     Section 17 hereof.


___________________
/1/     / Plus an option to purchase from the Company, up to [        ]
additional Securities to cover over-allotments


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               As part of the offering contemplated by this Agreement, Salomon
     Smith Barney Inc. has agreed to reserve out of the Securities set forth
     opposite its name on the Schedule II to this Agreement, up to [        ]
     shares, for sale to the Company's employees, officers, and directors and
     other parties associated with the Company (collectively, "Participants"),
     as set forth in the Prospectus under the heading "Underwriting" (the
     "Directed Share Program").  The Securities to be sold by Salomon Smith
     Barney Inc. pursuant to the Directed Share Program (the "Directed Shares")
     will be sold by Salomon Smith Barney Inc. pursuant to this Agreement at the
     public offering price.  Any Directed Shares not orally confirmed for
     purchase by any Participants by the end of the business day on which this
     Agreement is executed will be offered to the public by Salomon Smith Barney
     Inc. as set forth in the Prospectus.

               1.  Representations and Warranties.  The Company represents and
     warrants to, and agrees with, each Underwriter as set forth below in this
     Section 1.

               (a)  The Company has prepared and filed with the Commission a
          registration statement (file number         ) on Form S-1, including a
          related preliminary prospectus, for registration under the Act of the
          offering and sale of the Securities.  The Company may have filed one
          or more amendments thereto, including a related preliminary
          prospectus, each of which has previously been furnished to you.  The
          Company will next file with the Commission either (1) prior to the
          Effective Date of such registration statement, a further amendment to
          such registration statement (including the form of final prospectus)
          or (2) after the Effective Date of such registration statement, a
          final prospectus in accordance with Rules 430A and 424(b). In the case
          of clause (2), the Company has included in such registration
          statement, as amended at the Effective Date, all information (other
          than Rule 430A Information) required by the Act and the rules
          thereunder to be included in such registration statement and the
          Prospectus.  As filed, such amendment and form of final prospectus, or
          such final prospectus, shall contain all Rule 430A Information,
          together with all other such required information, and, except to the
          extent the Representatives shall agree in writing to a modification,
          shall be in all substantive respects in the form furnished to you
          prior to the Execution Time or, to the extent not completed at the
          Execution Time, shall contain only such specific additional
          information and other changes (beyond that contained in the latest
          Preliminary Prospectus) as the Company has advised you, prior to the
          Execution Time, will be included or made therein.

               (b)  On the Effective Date, the Registration Statement did or
          will, and when the Prospectus is first filed (if required) in
          accordance with Rule 424(b) and on the Closing Date (as defined
          herein) and on any date on which Option Securities are purchased, if
          such date is not the Closing Date (a "settlement date"), the
          Prospectus (and any supplements thereto) will, comply in all material
          respects with the applicable requirements of the Act and the rules
          thereunder; on the Effective Date and at the Execution Time, the
          Registration Statement did not or will not 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 not misleading; and, on the Effective Date, the
          Prospectus, if not filed pursuant to Rule 424(b), will not, and on the
          date of any filing pursuant



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          to Rule 424(b) and on the Closing Date and any settlement date, the
          Prospectus (together with any supplement thereto) will not, include
          any untrue statement of a material fact or omit to state a material
          fact necessary in order to make the statements therein, in the light
          of the circumstances under which they were made, not misleading;
          provided, however, that the Company makes no representations or
          warranties as to the information contained in or omitted from the
          Registration Statement, or the Prospectus (or any supplement thereto)
          in reliance upon and in conformity with information furnished in
          writing to the Company by or on behalf of any Underwriter through the
          Representatives specifically for inclusion in the Registration
          Statement or the Prospectus (or any supplement thereto).

               (c)  The Company has been duly incorporated and is validly
          existing as a corporation in good standing under the laws of the State
          of California, with full corporate power and authority to own or
          lease, as the case may be, and to operate its properties and conduct
          its business as described in the Registration Statement and Prospectus
          (and any amendment or supplement thereto), and is duly qualified to do
          business as a foreign corporation and is in good standing under the
          laws of each jurisdiction which requires such qualification.

               (d)  The Company does not have any subsidiaries.

               (e)  The Company's authorized equity capitalization is as set
          forth in the Prospectus and the capital stock of the Company conforms
          in all material respects to the description thereof contained in the
          Prospectus; the outstanding shares of Common Stock have been duly and
          validly authorized and issued and are fully paid and nonassessable;
          the Securities have been duly and validly authorized, and, when issued
          and delivered to and paid for by the Underwriters pursuant to this
          Agreement, will be fully paid and nonassessable; the Securities are
          duly quoted, and admitted and authorized for trading, subject to
          official notice of issuance and evidence of satisfactory distribution,
          on the Nasdaq National Market; the certificates for the Securities
          comply with the requirements of Delaware law;  the holders of
          outstanding shares of capital stock of the Company are not entitled to
          preemptive or other rights to subscribe for the Securities; and except
          as set forth in the Prospectus, no options, warrants or other rights
          to purchase, agreements or other obligations to issue, or rights to
          convert any obligations into or exchange any Securities for, shares of
          capital stock of or ownership interests in the Company are
          outstanding.

               (f)  There is no franchise, contract or other document of a
          character required to be described in the Registration Statement or
          Prospectus, or to be filed as an exhibit thereto, which is not
          described or filed as required; and the statements in the Prospectus
          insofar as such statements summarize legal matters, agreements,
          documents, or proceedings discussed therein, are accurate and fair
          summaries of such legal matters, agreements, documents or proceedings.

               (g)  This Agreement has been duly authorized, executed and
          delivered by the Company and constitutes a valid and binding
          obligation of the Company enforceable in accordance with its terms.



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               (h) The Company is not and, after giving effect to the offering
          and sale of the Securities and the application of the proceeds thereof
          as described in the Prospectus, will not be an "investment company" as
          defined in the Investment Company Act of 1940, as amended.

               (i) No consent, approval, authorization, filing with or order of
          any court or governmental agency or body is required in connection
          with the transactions contemplated herein, except such as have been
          obtained under the Act and such as may be required under the blue sky
          laws of any jurisdiction in connection with the purchase and
          distribution of the Securities by the Underwriters in the manner
          contemplated herein and in the Prospectus.

               (j) Neither the issue and sale of the Securities nor the
          consummation of any other of the transactions herein contemplated nor
          the fulfillment of the terms hereof will conflict with, result in a
          breach or violation or imposition of any lien, charge or encumbrance
          upon any property or assets of the Company pursuant to (1) the charter
          or bylaws of the Company, (2) the terms of any indenture, contract,
          lease, mortgage, deed of trust, note agreement, loan agreement or
          other agreement, obligation, condition, covenant or instrument to
          which the Company is a party or bound or to which its property is
          subject or (3) any statute, law, rule, regulation, judgment, order or
          decree applicable to the Company of any court, regulatory body,
          administrative agency, governmental body, arbitrator or other
          authority having jurisdiction over the Company or any of its
          properties.

               (k) Except as disclosed in the Prospectus, no holders of
          securities of the Company have rights to the registration of such
          securities under the Registration Statement.

               (l) The historical financial statements and schedules of the
          Company included in the Prospectus and the Registration Statement
          present fairly in all material respects the financial condition,
          results of operations and cash flows of the Company as of the dates
          and for the periods indicated, comply as to form with the applicable
          accounting requirements of the Act and have been prepared in
          conformity with generally accepted accounting principles applied on a
          consistent basis throughout the periods involved (except as otherwise
          noted therein).  The selected financial data set forth under the
          caption "Selected Financial Data" in the Prospectus and Registration
          Statement fairly present, on the basis stated in the Prospectus and
          the Registration Statement, the information included therein.

               (m) No action, suit or proceeding by or before any court or
          governmental agency, authority or body or any arbitrator involving the
          Company or its property is pending or, to the best knowledge of the
          Company, threatened that (1) could reasonably be expected to have a
          material adverse effect on the performance of this Agreement or the
          consummation of any of the transactions contemplated hereby or (2)
          could reasonably be expected to have a material adverse effect on the
          condition (financial or otherwise), prospects, earnings, business or
          properties of the Company, whether or not arising from transactions in
          the ordinary course of


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          business, except as set forth in or contemplated in the Prospectus
          (exclusive of any supplement thereto).

               (n)  The Company owns or leases all such real property as are
          necessary to the conduct of its operations as presently conducted.

               (o)  The Company is not in violation or default of (1) any
          provision of its charter or bylaws, (2) the terms of any indenture,
          contract, lease, mortgage, deed of trust, note agreement, loan
          agreement or other agreement, obligation, condition, covenant or
          instrument to which it is a party or bound or to which its property is
          subject, or (3) any statute, law, rule, regulation, judgment, order or
          decree of any court, regulatory body, administrative agency,
          governmental body, arbitrator or other authority having jurisdiction
          over the Company or any of its properties, as applicable, except, in
          the case of clauses (2) and (3) above, for such violations or
          defaults, which would not, individually or in the aggregate, have a
          material adverse effect on the condition (financial or otherwise),
          prospects, earnings, business or properties of the Company.

               (p)  PricewaterhouseCoopers LLP, who have certified certain
          financial statements of the Company and delivered their report with
          respect to the audited consolidated financial statements and schedules
          included in the Prospectus, are independent public accountants with
          respect to the Company within the meaning of the Act and the
          applicable published rules and regulations thereunder.

               (q)  There are no transfer taxes or other similar fees or charges
          under Federal law or the laws of any state, or any political
          subdivision thereof, required to be paid in connection with the
          execution and delivery of this Agreement or the issuance by the
          Company or sale by the Company of the Securities.

               (r)  The Company has filed all foreign, federal, state and local
          tax returns that are required to be filed or has requested extensions
          thereof (except in any case in which the failure so to file would not
          have a material adverse effect on the condition (financial or
          otherwise), prospects, earnings, business or properties of the Company
          whether or not arising from transactions in the ordinary course of
          business, except as set forth in or contemplated in the Prospectus
          (exclusive of any supplement thereto)  and has paid all taxes required
          to be paid by it and any other assessment, fine or penalty levied
          against it, to the extent that any of the foregoing is due and
          payable, except for any such assessment, fine or penalty that is
          currently being contested in good faith or as would not have a
          material adverse effect on the condition (financial or otherwise),
          prospects, earnings, business or properties of the Company, taken as a
          whole, whether or not arising from transactions in the ordinary course
          of business, except as set forth in or contemplated in the Prospectus
          (exclusive of any supplement thereto).

               (s)  No labor problem or dispute with the employees of the
          Company exists or is threatened or imminent, and the Company is not
          aware of any existing or imminent labor disturbance by the employees
          of any of its principal suppliers, contractors or customers, that
          could have a material adverse effect on the


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          condition (financial or otherwise), prospects, earnings, business or
          properties of the Company, whether or not arising from transactions in
          the ordinary course of business, except as set forth in or
          contemplated in the Prospectus (exclusive of any supplement thereto).

               (t)  The Company is insured by insurers of recognized financial
          responsibility against such losses and risks and in such amounts as
          are prudent and customary in the business in which it engages; all
          policies of insurance and fidelity or surety bonds insuring the
          Company or its respective businesses, assets, employees, officers and
          directors are in full force and effect; the Company is in compliance
          with the terms of such policies and instruments in all material
          respects; and there are no claims by the Company under any such policy
          or instrument as to which any insurance company is denying liability
          or defending under a reservation of rights clause; and the Company has
          no reason to believe that it will not be able to renew its existing
          insurance coverage as and when such coverage expires or to obtain
          similar coverage from similar insurers as may be necessary to continue
          its business at a cost that would not have a material adverse effect
          on the condition (financial or otherwise), prospects, earnings,
          business or properties of the Company whether or not arising from
          transactions in the ordinary course of business, except as set forth
          in or contemplated in the Prospectus (exclusive of any supplement
          thereto).

               (u)  The Company possesses all licenses, certificates, permits
          and other authorizations issued by the appropriate federal, state or
          foreign regulatory authorities necessary to conduct its respective
          businesses, and the Company has not received any notice of proceedings
          relating to the revocation or modification of any such certificate,
          authorization or permit which, singly or in the aggregate, if the
          subject of an unfavorable decision, ruling or finding, would have a
          material adverse effect on the condition (financial or otherwise),
          prospects, earnings, business or properties of the Company whether or
          not arising from transactions in the ordinary course of business,
          except as set forth in or contemplated in the Prospectus (exclusive of
          any supplement thereto).

               (v)  The Company maintains a system of internal accounting
          controls sufficient to provide reasonable assurance that (1)
          transactions are executed in accordance with management's general or
          specific authorizations; (2) transactions are recorded as necessary to
          permit preparation of financial statements in conformity with
          generally accepted accounting principles and to maintain asset
          accountability; (3) access to assets is permitted only in accordance
          with management's general or specific authorization; and (4) the
          recorded accountability for assets is compared with the existing
          assets at reasonable intervals and appropriate action is taken with
          respect to any differences.

               (w)  The Company has not taken, directly or indirectly, any
          action that has constituted or that was designed to or might
          reasonably be expected to cause or result in, under the Exchange Act
          or otherwise, the stabilization or manipulation of the price of any
          security of the Company to facilitate the sale or resale of the
          Securities.


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               (x)  The Company (i) is in compliance with any and all applicable
          foreign, federal, state and local laws and regulations relating to the
          protection of human health and safety, the environment or hazardous or
          toxic substances or wastes, pollutants or contaminants ("Environmental
          Laws"), (ii) has received and is in compliance with all permits,
          licenses or other approvals required of them under applicable
          Environmental Laws to conduct its businesses and (iii) to its
          knowledge, has not received notice of any actual or potential
          liability for the investigation or remediation of any disposal or
          release of hazardous or toxic substances or wastes, pollutants or
          contaminants, except where such non-compliance with Environmental
          Laws, failure to receive required permits, licenses or other
          approvals, or liability would not, individually or in the aggregate,
          have a  material adverse change in the condition (financial or
          otherwise), prospects, earnings, business or properties of the
          Company, whether or not arising from transactions in the ordinary
          course of business, except as set forth in or contemplated in the
          Prospectus (exclusive of any supplement thereto).  The Company has not
          been named as a "potentially responsible party" under the
          Comprehensive Environmental Response, Compensation, and Liability Act
          of 1980, as amended.

               (y)  In the ordinary course of its business, the Company
          periodically reviews the effect of Environmental Laws on the business,
          operations and properties of the Company in the course of which it
          identifies and evaluates associated costs and liabilities (including,
          without limitation, any capital or operating expenditures required for
          clean-up, closure of properties or compliance with Environmental Laws,
          or any permit, license or approval, any related constraints on
          operating activities and any potential liabilities to third parties).
          On the basis of such review, the Company has reasonably concluded that
          such associated costs and liabilities would not, singly or in the
          aggregate, have a material adverse effect on the condition (financial
          or otherwise),  prospects, earnings, business or properties of the
          Company, whether or not arising from transactions in the ordinary
          course of business, except as set forth in or contemplated in the
          Prospectus (exclusive of any supplement thereto).

               (z)  The Company has fulfilled its obligations,  if any, under
          the minimum funding standards of Section 302 of the United States
          Employee Retirement Income Security Act of 1974 ("ERISA") and the
          regulations and published interpretations thereunder with respect to
          each "plan" (as defined in Section 3(3) of ERISA and such regulations
          and published interpretations) in which employees of the Company are
          eligible to participate and each such plan is in compliance in all
          material respects with the presently applicable provisions of ERISA
          and such regulations and published interpretations.  The Company has
          not incurred any unpaid liability to the Pension Benefit Guaranty
          Corporation (other than for the payment of premiums in the ordinary
          course) or to any such plan under Title IV of ERISA.

               (aa) The Company owns, possesses, licenses or has other rights to
          use, on reasonable terms, all patents, patent applications, trade and
          service marks, trade


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          and service mark registrations, trade names, copyrights, licenses,
          inventions, trade secrets, technology, know-how and other intellectual
          property (collectively, the "Intellectual Property") necessary for the
          conduct of the Company's business as now conducted or as proposed in
          the Prospectus to be conducted. With respect to such Intellectual
          Property, other than as described in the Prospectus (exclusive of any
          supplement thereto) under the headings "Risk Factors--We are currently
          involved in a patent interference action and if we do not prevail in
          this action, our business could suffer," "--Patents and other
          proprietary rights provide uncertain protections, and we may be unable
          to protect our intellectual property," "--Because the medical device
          industry is characterized by competing intellectual property, we may
          be sued for violating the intellectual property rights of others,"
          "Business-Patents and Proprietary Technology" and "--Legal
          Proceedings," (1) there are no rights of third parties to any such
          Intellectual Property; (2) there is no material infringement by third
          parties of any such Intellectual Property; (3) there is no pending or
          threatened action, suit, proceeding or claim by others challenging the
          Company's rights in or to any such Intellectual Property, and the
          Company is unaware of any facts which would form a reasonable basis
          for any such claim; (4) there is no pending or threatened action,
          suit, proceeding or claim by others challenging the validity or scope
          of any such Intellectual Property, and the Company is unaware of any
          facts which would form a reasonable basis for any such claim; (5)
          there is no pending or threatened action, suit, proceeding or claim by
          others that the Company infringes or otherwise violates any patent,
          trademark, copyright, trade secret or other proprietary rights of
          others, and the Company is unaware of any other fact which would form
          a reasonable basis for any such claim; (6) there is no U.S. patent or
          published U.S. patent application which contains claims that dominate
          or may dominate any Intellectual Property described in the Prospectus
          as being owned by or licensed to the Company or that interferes with
          the issued or pending claims of any such Intellectual Property; and
          (7) there is no prior art of which the Company is aware that may
          render any U.S. patent held by the Company invalid or any U.S. patent
          application held by the Company unpatentable which has not been
          disclosed to the U.S. Patent and Trademark Office.

               (bb) The statements contained in the Prospectus under the
          captions "Risk Factors--We are currently involved in a patent
          interference action and if we do not prevail in this action, our
          business could suffer," "--Patents and other proprietary rights
          provide uncertain protections, and we may be unable to protect our
          intellectual property," "--Complying with the FDA and other domestic
          and international regulatory authorities is an expensive and time-
          consuming process, and any failure to comply could result in
          substantial penalties," "--Product introductions or modifications may
          be delayed or cancelled as a result of the FDA regulatory process
          which could cause our revenues to be below expectations," "--Our
          certificate of incorporation and bylaws and Delaware law contain
          provisions that would discourage a takeover," "Business--Patents and
          Proprietary Technology," "--Government Regulation," "--Legal
          Proceedings," "Management--Employment Agreements," "Stock Plans,"
          "Description of Capital Stock," "Shares Eligible for Future Sale" and
          "United States Tax Consequence to Non-United States Holders", insofar
          as such statements summarize legal matters, agreements,


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9

          documents, or proceedings discussed therein, are accurate and fair
          summaries of such legal matters, agreements, documents or proceedings.

               (cc) The Company has such permits, licenses, franchises,
          authorizations and clearances ("Permits") of governmental or
          regulatory authorities, including, without limitation, the Food and
          Drug Administration (the "FDA") of the U.S. Department of Health and
          Human Services and/or any committee thereof, as are reasonably
          necessary to own, lease and operate its properties and to conduct its
          business in the manner described in the Prospectus, subject to such
          qualifications as may be set forth in the Prospectus, except where
          such failure to receive such Permits would not, individually or in the
          aggregate, have a material adverse effect on the condition (financial
          or otherwise), prospects, earnings, business or properties of the
          Company whether or not arising from transactions in the ordinary
          course of business, except as set forth in or contemplated in the
          Prospectus (exclusive of any supplement thereto); subject to such
          qualifications as may be set forth in the Prospectus, the Company has
          fulfilled and performed all its material obligations with respect to
          the Permits, and no event has occurred which allows, or after notice
          or lapse of time would allow, revocation or termination thereof or
          results in any other material impairment of the rights of the holder
          of any Permit, subject in each case to such qualification as may be
          set forth in the Prospectus.  Except as described in the Prospectus,
          none of the Permits contains any restriction that is materially
          burdensome to the Company.

               (dd) Except to the extent disclosed in the Registration Statement
          and the Prospectus (or any amendment or supplement thereto), the
          clinical, pre-clinical and other studies and tests conducted by or on
          behalf of or sponsored by the Company or in which the Company or the
          Company's products under development have participated that are
          described in the Prospectus or the results of which are referred to in
          the Prospectus were and, if still pending, are being conducted in
          accordance with standard medical and scientific research procedures.
          The descriptions of the results of such studies and tests are accurate
          and complete in all material respects and fairly present the data
          derived from such studies and tests, and the Company has no knowledge
          of any other studies or tests the results of which are inconsistent
          with or otherwise call into question the results described or referred
          to in the Prospectus.  Except to the extent disclosed in the
          Registration Statement and the Prospectus (or any amendment or
          supplement thereto), the Company has operated and currently is in
          compliance in all material respects with all applicable FDA rules,
          regulations and policies.  Except to the extent disclosed in the
          Registration Statement and the Prospectus (or any amendment or
          supplement thereto), the Company has not received any notices or other
          correspondence from the FDA or any other governmental agency requiring
          the termination, suspension or modification of any clinical or pre-
          clinical studies or tests that are described in the Prospectus or the
          results of which are referred to in the Prospectus.]

               (ee) The Company (1) does not have any material lending or other
          relationship with any bank or lending affiliate of Salomon Smith
          Barney Holdings Inc. or any other underwriter and (2) does not intend
          to use any of the proceeds


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10

          from the sale of the Securities hereunder to repay any outstanding
          debt owed to any affiliate of Salomon Smith Barney Holding Inc. or any
          other underwriter.

               (ff) The Company has not offered, or caused the Underwriters to
          offer, Securities to any person pursuant to the Direct Share Program
          with the specific intent to unlawfully influence (i) a customer or
          supplier of the Company to alter the customer's or supplier's level or
          type of business with the Company, or (ii) a trade journalist or
          publication to write or publish favorable information about the
          company or its products.

               Furthermore, the Company represents and warrants to Salomon Smith
     Barney Inc. that (i) the Registration Statement, the Prospectus and any
     preliminary prospectus comply, and any further amendments or supplements
     thereto will comply, with any applicable laws or regulations of foreign
     jurisdictions in which the Prospectus or any preliminary prospectus, as
     amended or supplemented, if applicable, are distributed in connection with
     the Directed Share Program, and that (ii) no authorization, approval,
     consent, license, order, registration or qualification of or with any
     government, governmental instrumentality or court, other than such as have
     been obtained, is necessary under the securities laws and regulations of
     foreign jurisdictions in which the Directed Shares are offered outside the
     United States.

               Any certificate signed by any officer of the Company and
     delivered to the Representatives or counsel for the Underwriters in
     connection with the offering of the Securities shall be deemed a
     representation and warranty by the Company, as to matters covered thereby,
     to each Underwriter.

               2.   Purchase and Sale.  (a) Subject to the terms and conditions
     and in reliance upon the representations and warranties herein set forth,
     the Company agrees to sell to each Underwriter, and each Underwriter
     agrees, severally and not jointly, to purchase from the Company, at a
     purchase price of $[  ] per share, the amount of the Underwritten
     Securities set forth opposite such Underwriter's name in Schedule I hereto.

               (b)  Subject to the terms and conditions and in reliance upon the
     representations and warranties herein set forth, the Company hereby grants
     an option to the several Underwriters to purchase, severally and not
     jointly, up to [         ] Option Securities at the same purchase price per
     share as the Underwriters shall pay for the Underwritten Securities.  Said
     option may be exercised only to cover over-allotments in the sale of the
     Underwritten Securities by the Underwriters.  Said option may be exercised
     in whole or in part at any time (but not more than once) on or before the
     30th day after the date of the Prospectus upon written or telegraphic
     notice by the Representatives to the Company setting forth the number of
     shares of the Option Securities as to which the several Underwriters are
     exercising the option and the settlement date.  The number of Option
     Securities to be purchased by each Underwriter shall be the same percentage
     of the total number of shares of the Option Securities to be purchased by
     the several Underwriters as such Underwriter is purchasing of the
     Underwritten Securities, subject to such adjustments as you in your
     absolute discretion shall make to eliminate any fractional shares.


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11


               3.   Delivery and Payment.  Delivery of and payment for the
     Underwritten Securities and the Option Securities (if the option provided
     for in Section 2(b) hereof shall have been exercised on or before the third
     Business Day prior to the Closing Date) shall be made at 10:00 AM, New York
     City time, on [     ], 2000 , or at such time on such later date not more
     than three Business Days after the foregoing date as the Representatives
     shall designate, which date and time may be postponed by agreement between
     the Representatives and the Company or as provided in Section 9 hereof
     (such date and time of delivery and payment for the Securities being herein
     called the "Closing Date"). Delivery of the Securities shall be made to the
     Representatives for the respective accounts of the several Underwriters
     against payment by the several Underwriters through the Representatives of
     the purchase price thereof to or upon the order of the Company by wire
     transfer payable in same-day funds to an account specified by the Company.
     Delivery of the Underwritten Securities and the Option Securities shall be
     made through the facilities of The Depository Trust Company unless the
     Representatives shall otherwise instruct.

               If the option provided for in Section 2(b) hereof is exercised
     after the third Business Day prior to the Closing Date, the Company will
     deliver the Option Securities (at the expense of the Company) to the
     Representatives, at 388 Greenwich Street, New York, New York, on the date
     specified by the Representatives (which shall be within three Business Days
     after exercise of said option) for the respective accounts of the several
     Underwriters, against payment by the several Underwriters through the
     Representatives of the purchase price thereof to or upon the order of the
     Company by wire transfer payable in same-day funds to an account specified
     by the Company.  If settlement for the Option Securities occurs after the
     Closing Date, the Company will deliver to the Representatives on the
     settlement date for the Option Securities, and the obligation of the
     Underwriters to purchase the Option Securities shall be conditioned upon
     receipt of, supplemental opinions, certificates and letters confirming as
     of such date the opinions, certificates and letters delivered on the
     Closing Date pursuant to Section 6 hereof.

               4.   Offering by Underwriters.  It is understood that the several
     Underwriters propose to offer the Securities for sale to the public as set
     forth in the Prospectus.

               5.   Agreements.  The Company agrees with the several
     Underwriters that:

               (a)  The Company will use its best efforts to cause the
          Registration Statement, if not effective at the Execution Time, and
          any amendment thereof, to become effective.  Prior to the termination
          of the offering of the Securities, the Company will not file any
          amendment of the Registration Statement or supplement to the
          Prospectus or any Rule 462(b) Registration Statement unless the
          Company has furnished you a copy for your review prior to filing and
          will not file any such proposed amendment or supplement to which you
          reasonably object.  Subject to the foregoing sentence, if the
          Registration Statement has become or becomes effective pursuant to
          Rule 430A, or filing of the Prospectus is otherwise required under
          Rule 424(b), the Company will cause the Prospectus, properly
          completed, and any supplement thereto to be filed with the Commission
          pursuant


<PAGE>

12

          to the applicable paragraph of Rule 424(b) within the time period
          prescribed and will provide evidence satisfactory to the
          Representatives of such timely filing. The Company will promptly
          advise the Representatives (1) when the Registration Statement, if not
          effective at the Execution Time, shall have become effective, (2) when
          the Prospectus, and any supplement thereto, shall have been filed (if
          required) with the Commission pursuant to Rule 424(b) or when any Rule
          462(b) Registration Statement shall have been filed with the
          Commission, (3) when, prior to termination of the offering of the
          Securities, any amendment to the Registration Statement shall have
          been filed or become effective, (4) of any request by the Commission
          or its staff for any amendment of the Registration Statement, or any
          Rule 462(b) Registration Statement, or for any supplement to the
          Prospectus or for any additional information, (5) of the issuance by
          the Commission of any stop order suspending the effectiveness of the
          Registration Statement or the institution or threatening of any
          proceeding for that purpose and (6) of the receipt by the Company of
          any notification with respect to the suspension of the qualification
          of the Securities for sale in any jurisdiction or the institution or
          threatening of any proceeding for such purpose. The Company will use
          its best efforts to prevent the issuance of any such stop order or the
          suspension of any such qualification and, if issued, to obtain as soon
          as possible the withdrawal thereof.

               (b)  If, at any time when a prospectus relating to the Securities
          is required to be delivered under the Act, any event occurs as a
          result of which the Prospectus as then supplemented would include any
          untrue statement of a material fact or omit to state any material fact
          necessary to make the statements therein in the light of the
          circumstances under which they were made not misleading, or if it
          shall be necessary to amend the Registration Statement or supplement
          the Prospectus to comply with the Act or the rules thereunder, the
          Company promptly will (1) notify the Representatives of any such
          event, (2) prepare and file with the Commission, subject to the second
          sentence of paragraph (a) of this Section 5, an amendment or
          supplement which will correct such statement or omission or effect
          such compliance; and (3) supply any supplemented Prospectus to you in
          such quantities as you may reasonably request.

               (c)  As soon as practicable, the Company will make generally
          available to its security holders and to the Representatives an
          earnings statement or statements of the Company which will satisfy the
          provisions of Section 11(a) of the Act and Rule 158 under the Act.

               (d)  The Company will furnish to the Representatives and counsel
          for the Underwriters signed copies of the Registration Statement
          (including exhibits thereto) and to each other Underwriter a copy of
          the Registration Statement (without exhibits thereto) and, so long as
          delivery of a prospectus by an Underwriter or dealer may be required
          by the Act, as many copies of each Preliminary Prospectus and the Pro
          spectus and any supplement thereto as the Representatives may
          reasonably request.

               (e)  The Company will arrange, if necessary, for the
          qualification of the Securities for sale under the laws of such
          jurisdictions as the Representatives may


<PAGE>

13

          designate and will maintain such qualifications in effect so long as
          required for the distribution of the Securities; provided that in no
          event shall the Company be obligated to qualify to do business in any
          jurisdiction where it is not now so qualified or to take any action
          that would subject it to service of process in suits, other than those
          arising out of the offering or sale of the Securities, in any
          jurisdiction where it is not now so subject.

               (f)  The Company will not, without the prior written consent of
          Salomon Smith Barney Inc., offer, sell, contract to sell, pledge, or
          otherwise dispose of, (or enter into any transaction which is designed
          to, or might reasonably be expected to, result in the disposition
          (whether by actual disposition or effective economic disposition due
          to cash settlement or otherwise) by the Company or any affiliate of
          the Company or any person in privity with the Company or any affiliate
          of the Company) directly or indirectly, including the filing (or
          participation in the filing) of a registration statement with the
          Commission in respect of, or establish or increase a put equivalent
          position or liquidate or decrease a call equivalent position within
          the meaning of Section 16 of the Exchange Act, any other shares of
          Common Stock or any securities convertible into, or exercisable, or
          exchangeable for, shares of Common Stock; or publicly announce an
          intention to effect any such transaction, for a period of 180 days
          after the date of the Underwriting Agreement, provided, however, that
          the Company may issue and sell Common Stock pursuant to any employee
          stock option plan, stock ownership plan or dividend reinvestment plan
          of the Company in effect at the Execution Time and the Company may
          issue Common Stock issuable upon the conversion of securities or the
          exercise of warrants outstanding at the Execution Time.

               (g)  The Company will not take, directly or indirectly, any
          action designed to or which has constituted or which might reasonably
          be expected to cause or result, under the Exchange Act or otherwise,
          in stabilization or manipulation of the price of any security of the
          Company to facilitate the sale or resale of the Securities.

               (h)  The Company agrees to pay the costs and expenses relating to
          the following matters: (1) the preparation, printing or reproduction
          and filing with the Commission of the Registration Statement
          (including financial statements and exhibits thereto), each
          Preliminary Prospectus, the Prospectus, and each amendment or
          supplement to any of them; (2) the printing (or reproduction) and
          delivery (including postage, air freight charges and charges for
          counting and packaging) of such copies of the Registration Statement,
          each Preliminary Prospectus, the Prospectus, and all amendments or
          supplements to any of them, as may, in each case, be reasonably
          requested for use in connection with the offering and sale of the
          Securities; (3) the preparation, printing, authentication, issuance
          and delivery of certificates for the Securities, including any stamp
          or transfer taxes in connection with the original issuance and sale of
          the Securities; (4) the printing (or reproduction) and delivery of
          this Agreement, any blue sky memorandum and all other agreements or
          documents printed (or reproduced) and delivered in connection with the
          offering of the Securities; (5) the registration of the Securities
          under the Exchange Act and the quoting of the Securities on the


<PAGE>

14

          Nasdaq National Market; (6) any registration or qualification of the
          Securities for offer and sale under the securities or blue sky laws of
          the several states (including filing fees and the reasonable fees and
          expenses of counsel for the Underwriters relating to such registration
          and qualification); (7) any filings required to be made with the
          National Association of Securities Dealers, Inc. (including filing
          fees and the reasonable fees and expenses of counsel for the
          Underwriters relating to such filings); (8) the transportation and
          other expenses incurred by or on behalf of Company representatives in
          connection with presentations to prospective purchasers of the
          Securities; (9) the fees and expenses of the Company's accountants and
          the fees and expenses of counsel (including local and special counsel)
          for the Company; and (10) all other costs and expenses incident to the
          performance by the Company of its obligations hereunder.

               (i)  In connection with the Directed Share Program, the Company
          will ensure that the Directed Shares will be restricted to the extent
          required by the National Association of Securities Dealers, Inc. (the
          "NASD") or the NASD rules from sale, transfer, assignment, pledge or
          hypothecation for a period of three months following the date of the
          effectiveness of the Registration Statement.  Salomon Smith Barney
          Inc. will notify the Company as to which Participants will need to be
          so restricted.  The Company will direct the removal of such transfer
          restrictions upon the expiration of such period of time.

               (j)  The Company will pay all fees and disbursements of counsel
          incurred by the Underwriters in connection with the Directed Share
          Program and stamp duties, similar taxes or duties or other taxes, if
          any, incurred by the Underwriters in connection with the Directed
          Share Program.

               Furthermore, the Company covenants with Salomon Smith Barney Inc.
          that the Company will comply with all applicable securities and other
          applicable laws, rules and regulations in each foreign jurisdiction in
          which the Directed Shares are offered in connection with the Directed
          Share Program.

               6.   Conditions to the Obligations of the Underwriters.  The
     obligations of the Underwriters to purchase the Underwritten Securities and
     the Option Securities, as the case may be, shall be subject to the accuracy
     of the representations and warranties on the part of the Company contained
     herein as of the Execution Time, the Closing Date and any settlement date
     pursuant to Section 3 hereof, to the accuracy of the statements of the
     Company made in any certificates pursuant to the provisions hereof, to the
     performance by the Company of its obligations hereunder and to the
     following additional conditions:

               (a)  If the Registration Statement has not become effective prior
          to the Execution Time, unless the Representatives agree in writing to
          a later time, the Registration Statement will become effective not
          later than (1) 6:00 PM New York City time on the date of determination
          of the public offering price, if such determination occurred at or
          prior to 3:00 PM New York City time on such date or (2) 9:30 AM on the
          Business Day following the day on which the public offering price was
          determined, if such determination occurred after 3:00 PM New York City
          time on such date; if filing of the Prospectus, or any supplement


<PAGE>

15


          thereto, is required pursuant to Rule 424(b), the Prospectus, and any
          such supplement, will be filed in the manner and within the time
          period required by Rule 424(b); and no stop order suspending the
          effectiveness of the Registration Statement shall have been issued and
          no proceedings for that purpose shall have been instituted or
          threatened.

               (b)  The Company shall have requested and caused Venture Law
          Group, counsel for the Company, to have furnished to the
          Representatives their opinion, dated the Closing Date and addressed to
          the Representatives, to the effect that:

                    (1) the Company is duly incorporated and is validly existing
               as a corporation in good standing under the laws of the
               jurisdiction in which it is chartered or organized, with full
               corporate power and authority to own or lease, as the case may
               be, and to operate its properties and conduct its business as
               described in the Prospectus; and the Company is duly qualified to
               do business as a foreign corporation and is in good standing
               under the laws of each jurisdiction which requires such
               qualification;

                    (2) the Company's authorized equity capitalization is as set
               forth in the Prospectus; the capital stock of the Company
               conforms in all material respects to the description thereof
               contained in the Prospectus; the outstanding shares of Common
               Stock have been duly and validly authorized and issued and are
               fully paid and nonassessable; the Securities have been duly and
               validly authorized, and, when issued and delivered to and paid
               for by the Underwriters pursuant to this Agreement, will be fully
               paid and nonassessable; the Securities have been approved to be
               included for quotation on the Nasdaq National Market upon
               issuance as contemplated by this Agreement; the certificates for
               the Securities are in valid and sufficient form and conform in
               all material respects to the requirements of Delaware law; the
               holders of outstanding shares of capital stock of the Company are
               not entitled to preemptive or other rights to subscribe for the
               Securities; and, except as set forth in the Prospectus, no
               options, warrants or other rights to purchase, agreements or
               other obligations to issue, or rights to convert any obligations
               into or exchange any securities for, shares of capital stock of
               or ownership interests in the Company are outstanding;

                    (3) to the knowledge of such counsel, there is no pending or
               threatened action, suit or proceeding by or before any court or
               governmental agency, authority or body or any arbitrator
               involving the Company or its property of a character required to
               be disclosed in the Registration Statement which is not
               adequately disclosed in the Prospectus, and there is no
               franchise,  contract or other document of a character required to
               be described in the Registration Statement or Prospectus (or any
               amendment or supplement thereto), or to be filed as an exhibit
               thereto, which is not described or filed as required; and the
               statements included in the Prospectus insofar as such statements
               summarize legal matters, agreements, documents, or proceedings


<PAGE>

16

               discussed therein, are accurate and fair summaries of such legal
               matters, agreements, documents or proceedings;

                    (4) the Registration Statement has become effective under
               the Act; any required filing of the Prospectus, and any
               supplements thereto, pursuant to Rule 424(b) has been made in the
               manner and within the time period required by Rule 424(b); to the
               knowledge of such counsel, no stop order suspending the
               effectiveness of the Registration Statement has been issued, no
               proceedings for that purpose have been instituted or threatened
               and the Registration Statement and the Prospectus (other than the
               financial statements and other financial information contained
               therein, as to which such counsel need express no opinion) comply
               as to form in all material respects with the applicable
               requirements of the Act and the rules thereunder; and such
               counsel has no reason to believe that on the Effective Date or
               the date the Registration Statement was last deemed amended the
               Registration Statement contained any untrue statement of a
               material fact or omitted to state any material fact required to
               be stated therein or necessary to make the statements therein not
               misleading or that the Prospectus as of its date and on the
               Closing Date included or includes any untrue statement of a
               material fact or omitted or omits to state a material fact
               necessary to make the statements therein, in the light of the
               circumstances under which they were made, not misleading (in each
               case, other than the financial statements and other financial
               information  contained therein, as to which such counsel need
               express no opinion);

                    (5) this Agreement has been duly authorized, executed and
               delivered by the Company;

                    (6) the Company is not and, after giving effect to the
               offering and sale of the Securities and the application of the
               proceeds thereof as described in the Prospectus, will not be, an
               "investment company" as defined in the Investment Company Act of
               1940, as amended;

                    (7) no consent, approval, authorization, filing with or
               order of any court or governmental agency or body is required in
               connection with the transactions contemplated herein, except such
               as have been obtained under the Act and such as may be required
               under the blue sky laws of any jurisdiction in connection with
               the purchase and distribution of the Securities by the
               Underwriters in the manner contemplated in this Agreement and in
               the Prospectus and such other approvals (specified in such
               opinion) as have been obtained;

                    (8) neither the issue and sale of the Securities, nor the
               consummation of any other of the transactions herein contemplated
               nor the fulfillment of the terms hereof will conflict with,
               result in a breach or violation of or imposition of any lien,
               charge or encumbrance upon any property or assets of the Company
               pursuant to, (i) the charter or bylaws of the Company, (ii) the
               terms of any indenture, contract, lease, mortgage,


<PAGE>

17

               deed of trust, note agreement, loan agreement or other agreement,
               obligation, condition, covenant or instrument to which the
               Company is a party or bound or to which its or their property is
               subject, or (iii) any statute, law, rule, regulation, judgment,
               order or decree applicable to the Company of any court,
               regulatory body, administrative agency, governmental body,
               arbitrator or other authority having jurisdiction over the
               Company or any of its properties; and

                    (9) Except as disclosed in the Prospectus, no holders of
               securities of the Company have rights to the registration of such
               securities under the Registration Statement.

          In rendering such opinion, such counsel may rely (A) as to matters
          involving the application of laws of any jurisdiction other than the
          State of California or the Federal laws of the United States, to the
          extent they deem proper and specified in such opinion, upon the
          opinion of other counsel of good standing whom they believe to be
          reliable and who are satisfactory to counsel for the Underwriters and
          (B) as to matters of fact, to the extent they deem proper, on
          certificates of responsible officers of the Company and public
          officials.  References to the Registration Statement or Prospectus in
          this paragraph (b) include any amendments or supplements thereto at
          the Closing Date.

               (c)  The Representatives shall have received from Cravath, Swaine
          & Moore, counsel for the Underwriters, such opinion or opinions, dated
          the Closing Date and addressed to the Representatives, with respect to
          the issuance and sale of the Securities, the Registration Statement,
          the Prospectus (together with any amendment or supplement thereto) and
          other related matters as the Representatives may reasonably require,
          and the Company shall have furnished to such counsel such documents as
          they request for the purpose of enabling them to pass upon such
          matters.

               (d)  The Company shall have furnished to the Representatives a
          certificate of the Company, signed by the President and the principal
          financial or accounting officer of the Company, dated the Closing
          Date, to the effect that the signers of such certificate have
          carefully examined the Registration Statement, any amendments to the
          Registration Statement, the Prospectus, any supplements to the
          Prospectus and this Agreement and that:

                    (1) the representations and warranties of the Company in
               this Agreement are true and correct on and as of the Closing Date
               with the same effect as if made on the Closing Date and the
               Company has complied with all the agreements and satisfied all
               the conditions on its part to be performed or satisfied at or
               prior to the Closing Date;

                    (2) no stop order suspending the effectiveness of the
               Registration Statement has been issued and no proceedings for
               that purpose have been instituted or, to the Company's knowledge,
               threatened; and


<PAGE>

18


                    (3) since the date of the most recent financial statements
               included in the Prospectus (exclusive of any supplement thereto),
               there has been no material adverse effect on the condition
               (financial or otherwise), prospects, earnings, business or
               properties of the Company, whether or not arising from
               transactions in the ordinary course of business, except as set
               forth in or contemplated in the Prospectus (exclusive of any
               supplement thereto).

               (e) The Company shall have requested and caused
          PricewaterhouseCoopers LLP to have furnished to the Representatives,
          at the Execution Time and at the Closing Date, letters, dated
          respectively as of the Execution Time and as of the Closing Date, in
          form and substance satisfactory to the Representatives, confirming
          that they are independent accountants within the meaning of the Act
          and the applicable rules and regulations adopted by the Commission
          thereunder and that they have performed a review of the unaudited
          interim financial information of the Company for the 3-month period
          ended March 31, 2000, and as at March 31, 2000, in accordance with
          Statement on Auditing Standards No. 71 and stating in effect that:

                    (1) in their opinion the audited financial statements and
               financial statement schedules included in the Registration
               Statement and the Prospectus and reported on by them comply as to
               form in all material respects with the applicable accounting
               requirements of the Act and the related rules and regulations
               adopted by the Commission;

                    (2) on the basis of a reading of the latest unaudited
               financial statements made available by the Company and its
               subsidiaries; their limited review in accordance with standards
               established under Statement on Auditing Standards No. 71, of the
               unaudited interim financial information for the 3-month period
               ended March 31, 2000, and as at March 31, 2000, as indicated in
               their report dated           , 2000, carrying out certain
               specified procedures (but not an examination in accordance with
               generally accepted auditing standards) which would not
               necessarily reveal matters of significance with respect to the
               comments set forth in such letter; a reading of the minutes of
               the meetings of the stockholders, directors and audit and
               compensation committees of the Company; and inquiries of certain
               officials of the Company who have responsibility for financial
               and accounting matters of the Company and its subsidiaries as to
               transactions and events subsequent to December 31, 1999, nothing
               came to their attention which caused them to believe that:

                         (i)  any unaudited financial statements included in the
                    Registration Statement and the Prospectus do not comply as
                    to form in all material respects with applicable accounting
                    requirements of the Act and with the related rules and
                    regulations adopted by the Commission with respect to
                    registration statements on Form S-1; and said unaudited
                    financial statements are not in conformity with generally
                    accepted accounting principles applied on a basis
                    substantially consistent with that of the audited financial


<PAGE>

19

                    statements included in the Registration Statement and the
                    Prospectus;

                         (ii)  with respect to the period subsequent to March
                    31, 2000, there were any changes, at a specified date not
                    more than five days prior to the date of the letter, in the
                    working capital of the Company and its subsidiaries or total
                    assets of the Company or decreases in the stockholders'
                    equity of the Company as compared with the amounts shown on
                    the December 31, 1999, balance sheet included in the
                    Registration Statement and the Prospectus, or for the period
                    from April 1, 2000, to such specified date there were any
                    decreases, as compared with the corresponding period in the
                    preceding quarter, in revenues, or increases, as compared
                    with the corresponding period in the preceding quarter, in
                    loss from operations, net loss or basic and diluted loss per
                    share for the Company and its subsidiaries, except in all
                    instances for changes, decreases or increases set forth in
                    such letter, in which case the letter shall be accompanied
                    by an explanation by the Company as to the significance
                    thereof unless said explanation is not deemed necessary by
                    the Representatives;

                         (iii) the information included in the Registration
                    Statement and Prospectus in response to Regulation S-K, Item
                    301 (Selected Financial Data), Item 302 (Supplementary
                    Financial Information) and Item 402 (Executive Compensation)
                    is not in conformity with the applicable disclosure
                    requirements of Regulation S-K; and

                         (iv)  the unaudited amounts included under "Prospectus
                    Summary--Summary Financial Data" and "Selected Financial
                    Data" do not agree with the amounts set forth in the
                    unaudited financial statements for the same periods or were
                    not determined on a basis substantially consistent with that
                    of the corresponding amounts in the audited financial
                    statements included in the Registration Statement and the
                    Prospectus; and

                    (3)  they have performed certain other specified procedures
               as a result of which they determined that certain information of
               an accounting, financial or statistical nature (which is limited
               to accounting, financial or statistical information derived from
               the general accounting records of the Company and its
               subsidiaries) set forth in the Registration Statement and the
               Prospectus, including the information set forth under the
               captions "Prospectus Summary," "Capitalization," Selected
               Financial Data," "Management's Discussion and Analysis of
               Financial Condition and Results of Operations" in the Prospectus,
               agrees with the accounting records of the Company and its
               subsidiaries, excluding any questions of legal interpretation.

<PAGE>

20


               References to the Prospectus in this paragraph (e) include any
     supplement thereto at the date of the letter.

               The Company shall have received from PricewaterhouseCoopers LLP
     (and furnished to the Representatives) a report with respect to a review of
     unaudited interim financial information in the Management's Discussion and
     Analysis of Financial Condition and Results of Operations of the Company
     for the four quarters ending March 31, 2000 in accordance with Statement on
     Auditing Standards No. 71.

               (f)  Subsequent to the Execution Time or, if earlier, the dates
          as of which information is given in the Registration Statement
          (exclusive of any amendment thereof) and the Prospectus (exclusive of
          any supplement thereto), there shall not have been (i) any change or
          decrease specified in the letter or letters referred to in paragraph
          (e) of this Section 6 or (ii) any change, or any development involving
          a prospective change, in or affecting the condition (financial or
          otherwise), earnings, business or properties of the Company, whether
          or not arising from transactions in the ordinary course of business,
          except as set forth in or contemplated in the Prospectus (exclusive of
          any supplement thereto) the effect of which, in any case referred to
          in clause (i) or (ii) above, is, in the sole judgment of the
          Representatives, so material and adverse as to make it impractical or
          inadvisable to proceed with the offering or delivery of the Securities
          as contemplated by the Registration Statement (exclusive of any
          amendment thereof) and the Prospectus (exclusive of any supplement
          thereto).

               (g)  The Company shall have requested and caused Wilson Sonsini
          Goodrich & Rosati, a Professional Corporation, patent counsel to the
          Company, and Olsson, Frank and Weeda, P.C., regulatory counsel to the
          Company, to have furnished to the Representatives their opinions,
          dated the Closing Date and addressed to the Representatives, in forms
          satisfactory to the Representatives.

               (h)  Prior to the Closing Date, the Company shall have furnished
          to the Representatives such further information, certificates and
          documents as the Repre sentatives may reasonably request.

               If any of the conditions specified in this Section 6 shall not
     have been fulfilled in all material respects when and as provided in this
     Agreement, or if any of the opinions and certificates mentioned above or
     elsewhere in this Agreement shall not be in all material respects
     reasonably satisfactory in form and substance to the Representatives and
     counsel for the Underwriters, this Agreement and all obligations of the
     Underwriters  hereunder may be canceled at, or at any time prior to the
     Closing Date by the Representatives. Notice of such cancelation shall be
     given to the Company in writing or by telephone or facsimile confirmed in
     writing.

               The documents required to be delivered by this Section 6 shall be
     delivered at the offices of Cravath, Swaine & Moore, counsel for the
     Underwriters, at Worldwide Plaza, 825 Eighth Avenue, New York, New York
     10019, on the Closing Date.


<PAGE>

21


               7.  Reimbursement of Underwriters' Expenses.  If the sale of the
     Securities provided for herein is not consummated because any condition to
     the obligations of the Underwriters set forth in Section 6 hereof is not
     satisfied, because of any termination pursuant to Section 10 hereof or
     because of any refusal, inability or failure on the part of the Company to
     perform any agreement herein or comply with any provision hereof other than
     by reason of a default by any of the Underwriters, the Company will
     reimburse the Underwriters severally through Salomon Smith Barney Inc. on
     demand for all out-of-pocket expenses (including reasonable fees and
     disbursements of counsel) that shall have been incurred by them in
     connection with the proposed purchase and sale of the Securities.

               8.  Indemnification and Contribution.  (a)  The Company agrees to
     indemnify and hold harmless each Underwriter, the directors, officers,
     employees and agents of each Underwriter and each person who controls any
     Underwriter within the meaning of either the Act or the Exchange Act
     against any and all losses, claims, damages or liabilities, joint or
     several, to which they or any of them may become subject under the Act, the
     Exchange Act or other Federal or state statutory law or regulation, at
     common law or otherwise, insofar as such losses, claims, damages or
     liabilities (or actions in respect thereof) arise out of or are based upon
     any untrue statement or alleged untrue statement of a material fact
     contained in the Registration Statement for the registration of the
     Securities as originally filed or in any amendment thereof, or in any
     Preliminary Prospectus or the Prospectus, or in any amendment thereof or
     supplement thereto, or arise out of or are based upon the omission or
     alleged omission to state therein a material fact required to be stated
     therein or necessary to make the statements therein not misleading, and
     agrees to reimburse each such indemnified party, as incurred, for any legal
     or other expenses reasonably incurred by them in connection with
     investigating or defending any such loss, claim, damage, liability or
     action; provided, however, that the Company will not be liable in any such
     case to the extent that any such loss, claim, damage or liability arises
     out of or is based upon any such untrue statement or alleged untrue
     statement or omission or alleged omission made therein in reliance upon and
     in conformity with written information furnished to the Company by or on
     behalf of any Underwriter through the Representatives specifically for
     inclusion therein.  This indemnity agreement will be in addition to any
     liability which the Company may otherwise have.

          (b)  The Company agrees to indemnify and hold harmless Salomon Smith
     Barney Inc., the directors, officers, employees and agents of Salomon Smith
     Barney Inc. and each person, who controls Salomon Smith Barney Inc. within
     the meaning of either the Act or the Exchange Act ("Salomon Smith Barney
     Inc. Entities"), from and against any and all losses, claims, damages and
     liabilities to which they may become subject under the Act, the Exchange
     Act or other Federal or state statutory law or regulation, at common law or
     otherwise (including, without limitation, any legal or other expenses
     reasonably incurred in connection with defending or investigating any such
     action or claim), insofar as such losses, claims, damages or liabilities
     (or actions in respect thereof) (i) arise out of or are based upon any
     untrue statement or alleged untrue statement of a material fact contained
     in the prospectus wrapper material prepared by or with the consent of the
     Company for distribution in foreign jurisdictions in connection with the
     Directed Share Program attached to the Prospectus or any preliminary
     prospectus, or arise out of or are based upon


<PAGE>

22

     the omission or alleged omission to state therein a material fact required
     to be stated therein or necessary to make the statement therein, when
     considered in conjunction with the Prospectus or any applicable preliminary
     prospectus, not misleading; (ii) caused by the failure of any Participant
     to pay for and accept delivery of the securities which immediately
     following the Effective Date of the Registration Statement, were subject to
     a properly confirmed agreement to purchase; or (iii) related to, arising
     out of, or in connection with the Directed Share Program, provided that,
     the Company will not be liable in any such case to the extent that any such
     loss, claim, damage, or liability arises out of or is based upon any such
     untrue statement or alleged untrue statement or omission or alleged
     omission made therein in reliance upon and in conformity with written
     information furnished to the Company by or on behalf of Salomon Smith
     Barney Inc. specifically for inclusion therein.

          (c)  Each Underwriter severally and not jointly agrees to indemnify
     and hold harmless the Company, each of its directors, each of its officers
     who signs the Registration Statement, and each person who controls the
     Company within the meaning of either the Act or the Exchange Act, to the
     same extent as the foregoing indemnity from the Company to each
     Underwriter, but only with reference to written information relating to
     such Underwriter furnished to the Company by or on behalf of such
     Underwriter through the Representatives specifically for inclusion in the
     documents referred to in the foregoing indemnity.  This indemnity agreement
     will be in addition to any liability which any Underwriter may otherwise
     have.  The Company acknowledges that the statements set forth in the last
     paragraph of the cover page regarding delivery of the Securities and, under
     the heading "Underwriting", (i) the list of Underwriters and their
     respective participation in the sale of the Securities, (ii) the sentences
     related to concessions and reallowances and (iii) the paragraph related to
     stabilization, syndicate covering transactions and penalty bids in any
     Preliminary Prospectus and the Prospectus constitute the only information
     furnished in writing by or on behalf of the several Underwriters for
     inclusion in any Preliminary Prospectus or the Prospectus.

          (d)  Promptly after receipt by an indemnified party under this Section
     8 of notice of the commencement of any action, such indemnified party will,
     if a claim in respect thereof is to be made against the indemnifying party
     under this Section 8, notify the indemnifying party in writing of the
     commencement thereof; but the failure so to notify the indemnifying party
     (i) will not relieve it from liability under paragraph (a) or (b) above
     unless and to the extent it did not otherwise learn of such action and such
     failure results in the forfeiture by the indemnifying party of substantial
     rights and defenses and (ii) will not, in any event, relieve the
     indemnifying party from any obligations to any indemnified party other than
     the indemnification obligation provided in paragraph (a) or (b) above.  The
     indemnifying party shall be entitled to appoint counsel of the indemnifying
     party's choice at the indemnifying party's expense to represent the
     indemnified party in any action for which indemnification is sought (in
     which case the indemnifying party shall not thereafter be responsible for
     the fees and expenses of any separate counsel retained by the indemnified
     party or parties except as set forth below); provided, however, that such
     counsel shall be satisfactory to the indemnified party.  Notwithstanding
     the indemnifying party's election to appoint counsel to represent the
     indemnified party in an action, the indemnified party shall have the right
     to employ separate counsel (including local counsel), and the indemnifying
     party shall bear the


<PAGE>

23

     reasonable fees, costs and expenses of such separate counsel if (i) the use
     of counsel chosen by the indemnifying party to represent the indemnified
     party would present such counsel with a conflict of interest, (ii) the
     actual or potential defendants in, or targets of, any such action include
     both the indemnified party and the indemnifying party and the indemnified
     party shall have reasonably concluded that there may be legal defenses
     available to it and/or other indemnified parties which are different from
     or additional to those available to the indemnifying party, (iii) the
     indemnifying party shall not have employed counsel satisfactory to the
     indemnified party to represent the indemnified party within a reasonable
     time after notice of the institution of such action or (iv) the
     indemnifying party shall authorize the indemnified party to employ separate
     counsel at the expense of the indemnifying party. An indemnifying party
     will not, without the prior written consent of the indemnified parties,
     settle or compromise or consent to the entry of any judgment with respect
     to any pending or threatened claim, action, suit or proceeding in respect
     of which indemnification or contribution may be sought hereunder (whether
     or not the indemnified parties are actual or potential parties to such
     claim or action) unless such settlement, compromise or consent includes an
     unconditional release of each indemnified party from all liability arising
     out of such claim, action, suit or proceeding. Notwithstanding anything
     contained herein to the contrary, if indemnity may be sought pursuant to
     Section 8(b) hereof in respect of such action or proceeding, then in
     addition to such separate firm for the indemnified parties, the
     indemnifying party shall be liable for the reasonable fees and expenses of
     not more than one separate firm (in addition to any local counsel) for
     Salomon Smith Barney Inc., the directors, officer, employees and agents of
     Salomon Smith Barney Inc., and all persons, if any, who control Salomon
     Smith Barney Inc. within the meaning of either the Act or the Exchange Act
     for the defense of any losses, claims, damages and liabilities arising out
     of the Directed Share Program.

          (e)  In the event that the indemnity provided in paragraph (a) or  (b)
     of this Section 8 is unavailable to or insufficient to hold harmless an
     indemnified party for any reason, the Company and the Underwriters
     severally agree to contribute to the aggregate losses, claims, damages and
     liabilities (including legal or other expenses reasonably incurred in
     connection with investigating or defending same) (collectively "Losses") to
     which the Company and one or more of the Underwriters may be subject in
     such proportion as is appropriate to reflect the relative benefits received
     by the Company on the one hand and by the Underwriters on the other from
     the offering of the Securities; provided, however, that in no case shall
     any Underwriter (except as may be provided in any agreement among
     underwriters relating to the offering of the Securities) be responsible for
     any amount in excess of the underwriting discount or commission applicable
     to the Securities purchased by such Underwriter hereunder.  If the
     allocation provided by the immediately preceding sentence is unavailable
     for any reason, the Company and the Underwriters severally shall contribute
     in such proportion as is appropriate to reflect not only such relative
     benefits but also the relative fault of the Company on the one hand and of
     the Underwriters on the other in connection with the statements or
     omissions which resulted in such Losses as well as any other relevant
     equitable considerations.  Benefits received by the Company shall be deemed
     to be equal to the total net proceeds from the offering (before deducting
     expenses) received by it, and benefits received by the Underwriters shall
     be deemed to be equal to the total underwriting discounts and commissions,
     in each case as set forth on the cover page of
<PAGE>

24

     the Prospectus. Relative fault shall be determined by reference to, among
     other things, whether any untrue or any alleged untrue statement of a
     material fact or the omission or alleged omission to state a material fact
     relates to information provided by the Company on the one hand or the
     Underwriters on the other, the intent of the parties and their relative
     knowledge, access to information and opportunity to correct or prevent such
     untrue statement or omission. The Company and the Underwriters agree that
     it would not be just and equitable if contribution were determined by pro
     rata allocation or any other method of allocation which does not take
     account of the equitable considerations referred to above. Notwithstanding
     the provisions of this paragraph (d), no person guilty of fraudulent
     misrepresentation (within the meaning of Section 11(f) of the Act) shall be
     entitled to contribution from any person who was not guilty of such
     fraudulent misrepresentation. For purposes of this Section 8, each person
     who controls an Underwriter within the meaning of either the Act or the
     Exchange Act and each director, officer, employee and agent of an
     Underwriter shall have the same rights to contribution as such Underwriter,
     and each person who controls the Company within the meaning of either the
     Act or the Exchange Act, each officer of the Company who shall have signed
     the Registration Statement and each director of the Company shall have the
     same rights to contribution as the Company, subject in each case to the
     applicable terms and conditions of this paragraph (d).

               9.  Default by an Underwriter.  If any one or more Underwriters
     shall fail to purchase and pay for any of the Securities agreed to be
     purchased by such Underwriter or Underwriters hereunder and such failure to
     purchase shall constitute a default in the performance of its or their
     obligations under this Agreement, the remaining Underwriters shall be
     obligated severally to take up and pay for (in the respective proportions
     which the amount of Securities set forth opposite their names in Schedule I
     hereto bears to the aggregate amount of Securities set forth opposite the
     names of all the remaining Under writers) the Securities which the
     defaulting Underwriter or Underwriters agreed but failed to purchase;
     provided, however, that in the event that the aggregate amount of
     Securities which the defaulting Underwriter or Underwriters agreed but
     failed to purchase shall exceed 10% of the aggregate amount of Securities
     set forth in Schedule I hereto, the remaining Underwriters shall have the
     right to purchase all, but shall not be under any obligation to purchase
     any, of the Securities, and if such nondefaulting Underwriters do not
     purchase all the Securities, this Agreement will terminate without
     liability to any nondefaulting Underwriter or the Company.  In the event of
     a default by any Underwriter as set forth in this Section 9, the Closing
     Date shall be postponed for such period, not exceeding five Business Days,
     as the Representatives shall determine in order that the required changes
     in the Registration Statement and the Prospectus or in any other documents
     or arrangements may be effected.  Nothing contained in this Agreement shall
     relieve any defaulting Underwriter of its liability, if any, to the Company
     and any nondefaulting Underwriter for damages occasioned by its default
     hereunder.

               10. Termination.  This Agreement shall be subject to termination
     in the absolute discretion of the Representatives, by notice given to the
     Company prior to delivery of and payment for the Securities, if at any time
     prior to such time (i) trading in the Company's Common Stock shall have
     been suspended by the Commission or the Nasdaq National Market or trading
     in securities generally on the New York Stock Exchange or the Nasdaq
     National Market shall have been suspended or limited or
<PAGE>

25

     minimum prices shall have been established on such Exchange or the Nasdaq
     National Market, (ii) a banking moratorium shall have been declared either
     by Federal or New York State authorities or (iii) there shall have occurred
     any outbreak or escalation of hostilities, declaration by the United States
     of a national emergency or war, or other calamity or crisis the effect of
     which on financial markets is such as to make it, in the sole judgment of
     the Representatives, impractical or inadvisable to proceed with the
     offering or delivery of the Securities as contemplated by the Prospectus
     (exclusive of any supplement thereto).

               11.  Representations and Indemnities to Survive. The respective
     agreements, representations, warranties, indemnities and other statements
     of the Company or its officers and of the Underwriters set forth in or made
     pursuant to this Agreement will remain in full force and effect, regardless
     of any investigation made by or on behalf of any Underwriter or the Company
     or any of the officers, directors, employees, agents or controlling persons
     referred to in Section 8 hereof, and will survive delivery of and payment
     for the Securities.  The provisions of Sections 7 and 8 hereof shall
     survive the termination or cancelation of this Agreement.

               12.  Notices.  All communications hereunder will be in writing
     and effective only on receipt, and, if sent to the Representatives, will be
     mailed, delivered or telefaxed to the Salomon Smith Barney Inc. General
     Counsel (fax no.: (212) 816-7912) and confirmed to the General Counsel,
     Salomon Smith Barney Inc., at 388 Greenwich Street, New York, New York,
     10013, Attention:  General Counsel; or, if sent to the Company, will be
     mailed, delivered or telefaxed to RITA Medical Systems, Inc., 967 N.
     Shoreline Blvd., Mountain View, CA 94043, attention: Barry Cheskin and
     confirmed to Venture Law Group, A Professional Corporation, 2000 Sand Hill
     Road, Menlo Park, CA 94025, attention:  Mark B. Weeks.

               13.  Successors.  This Agreement will inure to the benefit of and
     be binding upon the parties hereto and their respective successors and the
     officers, directors, employees, agents and controlling persons referred to
     in Section 8 hereof, and no other person will have any right or obligation
     hereunder.

               14.  Applicable Law.  This Agreement will be governed by and
     construed in accordance with the laws of the State of New York applicable
     to contracts made and to be performed within the State of New York.

               15.  Counterparts.  This Agreement may be signed in one or more
     counterparts, each of which shall constitute an original and all of which
     together shall constitute one and the same agreement.

               16.  Headings.  The section headings used herein are for
     convenience only and shall not affect the construction hereof.

               17.  Definitions.  The terms which follow, when used in this
     Agreement, shall have the meanings indicated.
<PAGE>

26

               "Act" shall mean the Securities Act of 1933, as amended, and the
     rules and regulations of the Commission promulgated thereunder.

               "Business Day" shall mean any day other than a Saturday, a Sunday
     or a legal holiday or a day on which banking institutions or trust
     companies are authorized or obligated by law to close in New York City.

               "Commission" shall mean the Securities and Exchange Commission.

               "Effective Date" shall mean each date and time that the
     Registration State ment, any post-effective amendment or amendments thereto
     and any Rule 462(b) Registration Statement became or become effective.

               "Exchange Act" shall mean the Securities Exchange Act of 1934, as
     amended, and the rules and regulations of the Commission promulgated
     thereunder.

               "Execution Time" shall mean the date and time that this Agreement
     is executed and delivered by the parties hereto.

               "Preliminary Prospectus" shall mean any preliminary prospectus
     referred to in paragraph 1(a) above and any preliminary prospectus included
     in the Registration Statement at the Effective Date that omits Rule 430A
     Information.

               "Prospectus" shall mean the prospectus relating to the Securities
     that is first filed pursuant to Rule 424(b) after the Execution Time or, if
     no filing pursuant to Rule 424(b) is required, shall mean the form of final
     prospectus relating to the Securities included in the Registration
     Statement at the Effective Date.

               "Registration Statement" shall mean the registration statement
     referred to in paragraph 1(a) above, including exhibits and financial
     statements, as amended at the Execution Time (or, if not effective at the
     Execution Time, in the form in which it shall become effective) and, in the
     event any post-effective amendment thereto or any Rule 462(b) Registration
     Statement becomes effective prior to the Closing Date, shall also mean such
     registration statement as so amended or such Rule 462(b) Registration
     Statement, as the case may be.  Such term shall include any Rule 430A
     Information deemed to be included therein at the Effective Date as provided
     by Rule 430A.

               "Rule 424", "Rule 430A" and "Rule 462" refer to such rules under
     the Act.

               "Rule 430A Information" shall mean information with respect to
     the Securities and the offering thereof permitted to be omitted from the
     Registration Statement when it becomes effective pursuant to Rule 430A.

               "Rule 462(b) Registration Statement" shall mean a registration
     statement and any amendments thereto filed pursuant to Rule 462(b) relating
     to the offering covered by the registration statement referred to in
     Section 1(a) hereof.


<PAGE>

27

               If the foregoing is in accordance with your understanding of our
     agreement, please sign and return to us the enclosed duplicate hereof,
     whereupon this letter and your acceptance shall represent a binding
     agreement among the Company and the several Underwriters.


                                    Very truly yours,

                                    RITA Medical Systems, Inc.

                                    By: ___________________________
                                        Name:    Barry Cheskin
                                        Title:   President and Chief
                                                 Executive Officer

     The foregoing Agreement is hereby
     confirmed and accepted as of the
     date first above written.

     Salomon Smith Barney Inc.
     Fleet Boston Robertson Stephens Inc.

     By:  Salomon Smith Barney Inc.

     By: _______________________
         Name:
         Title:

     For themselves and the other
     several Underwriters named in
     Schedule I to the foregoing
     Agreement.


<PAGE>

28

                                  SCHEDULE I
                                  ----------


                                                 Number of Underwritten
                                                    Securities to be
     Underwriters                                       Purchased
     ------------                                ----------------------

     Salomon Smith Barney Inc.
     FleetBoston Robertson Stephens Inc.





                                                     ____________

            Total . . . . . . . . .


<PAGE>

29

                                  SCHEDULE II
                                  -----------



                                             Number of Underwritten
                                             Securities Reserved for
     Underwriters                   Directed Share Program
     -----------------------------------------------------

     Salomon Smith Barney Inc.



                                             _____________

               Total . . . . . . . . .


<PAGE>


          EXHIBIT A


           [Letterhead of officer, director or major shareholder of
                                 Corporation]



                          RITA Medical Systems, Inc.
                          --------------------------
                        Public Offering of Common Stock
                        -------------------------------


          , 2000

     Salomon Smith Barney Inc.
     FleetBoston Robertson Stephens Inc.

     As Representatives of the several Underwriters,
     c/o Salomon Smith Barney Inc.
     388 Greenwich Street
     New York, New York 10013

     Ladies and Gentlemen:

               This letter is being delivered to you in connection with the
     proposed Underwriting Agreement (the "Underwriting Agreement"), between
     RITA Medical Systems, Inc., a California corporation (the "Company"), and
     each of you as representatives of a group of Underwriters named therein,
     relating to an underwritten public offering of Common Stock, $0.001 par
     value (the "Common Stock"), of the Company.

               In order to induce you and the other Underwriters to enter into
     the Underwriting Agreement, the undersigned will not, without the prior
     written consent of Salomon Smith Barney Inc., offer, sell, contract to
     sell, pledge or otherwise dispose of, (or enter into any transaction which
     is designed to, or might reasonably be expected to, result in the
     disposition (whether by actual disposition or effective economic
     disposition due to cash settlement or otherwise) by the undersigned or any
     affiliate of the undersigned or any person in privity with the undersigned
     or any affiliate of the undersigned), directly or indirectly, including the
     filing (or participation in the filing) of a registration statement with
     the Securities and Exchange Commission in respect of, or establish or
     increase a put equivalent position or liquidate or decrease a call
     equivalent position within the meaning of Section 16 of the Securities
     Exchange Act of 1934, as amended, and the rules and regulations of the
     Securities and Exchange Commission promulgated thereunder with respect to,
     any shares of capital stock of the Company or any securities convertible
     into, or exercisable or exchangeable for such capital stock, or publicly
     announce an intention to effect any such transaction, for a period of 180
     days after the date of the Underwriting Agreement.  The foregoing sentence
     shall not apply to

<PAGE>


     (a) shares of Common Stock disposed of as bona fide gifts, provided that
     the subsequent recipients are subject to an agreement similar to this
     agreement that is reasonably acceptable to Salomon Smith Barney Inc., (b)
     transactions relating to shares of Common Stock and other securities
     acquired in open market transactions after the completion of the public
     offering, and (c) shares purchased in the reserve share program; provided,
     however, that if the undersigned is a[n] (i) officer, (ii) director or
     (iii) shareholder that beneficially owns, directly or indirectly, more than
     5% of the outstanding Common Stock before or after the acquisition of
     Common Stock in the manner described in clauses (b) and (c) above, the
     undersigned may not transfer shares of Common Stock acquired in the manner
     described in clauses (b) or (c).

               If for any reason the Underwriting Agreement shall be terminated
     prior to the Closing Date (as defined in the Underwriting Agreement), the
     agreement set forth above shall likewise be terminated.


                                    Yours very truly,




                                      (Signature)



                                      (Printed Name)



                                      -----
                                      (Address)


                                      -----
                                      (Address)
<PAGE>


         ------------------ COMPARISON OF FOOTNOTES ------------------

         -FOOTNOTE 1-
         / Plus an option to purchase from the Company, up to [ ] additional
         Securities to cover over-allotments.


         ------------------ COMPARISON OF HEADERS ------------------

         -HEADER 1-
         1

         -HEADER 2-
         Header Discontinued


         ------------------ COMPARISON OF FOOTERS ------------------

         -FOOTER 1-
         [NYCorp; 1052952.3:4775d: 06/09/00-4:38p]

         -FOOTER 2-
         [Form 01]




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