SC 13G/A 1 0001.txt SC 13G/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 13G UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment no. 3) Corixa Corporation -------------------------------------------------------------------------------- (Name of Issuer) Common Stock -------------------------------------------------------------------------------- (Title of Class of Securities) 21887F 10 0 -------------------------------------------------------------------------------- (CUSIP Number) 12-31-2000 -------------------------------------------------------------------------------- (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedule is filed: [ ] Rule 13d-1(b) [ ] Rule 13d-1(c) [X] Rule 13d-1(d) *The remainder of this cover page shall be filled out for a reporting person's initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page. The information required in the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes). Page 1 of 15 pages
--------------------------------------- --------------------------------------- CUSIP No. 21887F 10 0 13G Page 2 of 15 Pages ----------- --------------------------------------- --------------------------------------- ---------- ------------------------------------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSONS S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS InterWest Partners V, LP ---------- ------------------------------------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (A) |_| (B) |X| ---------- ------------------------------------------------------------------------------------------------------------- 3 SEC USE ONLY ---------- ------------------------------------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION California ------------------------------ -------- -------------------------------------------------------------------------------- 5 SOLE VOTING POWER NUMBER OF 501,500 SHARES -------- -------------------------------------------------------------------------------- BENEFICIALLY 6 SHARED VOTING POWER OWNED BY EACH REPORTING PERSON WITH 0 -------- -------------------------------------------------------------------------------- 7 SOLE DISPOSITIVE POWER 501,500 -------- -------------------------------------------------------------------------------- 8 SHARED DISPOSITIVE POWER 0 ---------- ------------------------------------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 501,500 ---------- ------------------------------------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* ---------- ------------------------------------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 1.2% ---------- ------------------------------------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON* PN ---------- ------------------------------------------------------------------------------------------------------------- *SEE INSTRUCTION BEFORE FILLING OUT!
Page 2 of 15 pages
--------------------------------------- --------------------------------------- CUSIP No. 21887F 10 0 13G Page 3 of 15 Pages ----------- --------------------------------------- --------------------------------------- ---------- ------------------------------------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSONS S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS InterWest Management Partners V, LP (the General Partner of InterWest Partners V, LP) ---------- ------------------------------------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) |_| (b) |X| ---------- ------------------------------------------------------------------------------------------------------------- 3 SEC USE ONLY ---------- ------------------------------------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION California ------------------------------ -------- -------------------------------------------------------------------------------- 5 SOLE VOTING POWER NUMBER OF 501,500 SHARES -------- -------------------------------------------------------------------------------- BENEFICIALLY 6 SHARED VOTING POWER OWNED BY EACH REPORTING PERSON WITH 0 -------- -------------------------------------------------------------------------------- 7 SOLE DISPOSITIVE POWER 501,500 -------- -------------------------------------------------------------------------------- 8 SHARED DISPOSITIVE POWER 0 ---------- ------------------------------------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 501,500 ---------- ------------------------------------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* ---------- ------------------------------------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 1.2% ---------- ------------------------------------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON* PN ---------- ------------------------------------------------------------------------------------------------------------- *SEE INSTRUCTION BEFORE FILLING OUT!
Page 3 of 15 pages
--------------------------------------- --------------------------------------- CUSIP No. 21887F 10 0 13G Page 4 of 15 Pages ----------- --------------------------------------- --------------------------------------- ---------- ------------------------------------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSONS S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS Alan W. Crites (a General Partner of InterWest Management Partners V, LP) ---------- ------------------------------------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) |_| (b) |X| ---------- ------------------------------------------------------------------------------------------------------------- 3 SEC USE ONLY ---------- ------------------------------------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION United States ------------------------------ -------- -------------------------------------------------------------------------------- 5 SOLE VOTING POWER NUMBER OF 62,149 SHARES -------- -------------------------------------------------------------------------------- BENEFICIALLY 6 SHARED VOTING POWER OWNED BY EACH REPORTING PERSON WITH 504,654 -------- -------------------------------------------------------------------------------- 7 SOLE DISPOSITIVE POWER 62,149 -------- -------------------------------------------------------------------------------- 8 SHARED DISPOSITIVE POWER 504,654 ---------- ------------------------------------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 566,803 ---------- ------------------------------------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* ---------- ------------------------------------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 1.4% ---------- ------------------------------------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON* IN ---------- ------------------------------------------------------------------------------------------------------------- *SEE INSTRUCTION BEFORE FILLING OUT!
Page 4 of 15 pages
--------------------------------------- --------------------------------------- CUSIP No. 21887F 10 0 13G Page 5 of 15 Pages ----------- --------------------------------------- --------------------------------------- ---------- ------------------------------------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSONS S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS Philip T. Gianos (a General Partner of InterWest Management Partners V, LP) ---------- ------------------------------------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) |_| (b) |X| ---------- ------------------------------------------------------------------------------------------------------------- 3 SEC USE ONLY ---------- ------------------------------------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION United States ------------------------------ -------- -------------------------------------------------------------------------------- 5 SOLE VOTING POWER NUMBER OF 56,640 SHARES -------- -------------------------------------------------------------------------------- BENEFICIALLY 6 SHARED VOTING POWER OWNED BY EACH REPORTING PERSON WITH 501,500 -------- -------------------------------------------------------------------------------- 7 SOLE DISPOSITIVE POWER 56,640 -------- -------------------------------------------------------------------------------- 8 SHARED DISPOSITIVE POWER 501,500 ---------- ------------------------------------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 558,140 ---------- ------------------------------------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* ---------- ------------------------------------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 1.4% ---------- ------------------------------------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON* IN ---------- ------------------------------------------------------------------------------------------------------------- *SEE INSTRUCTION BEFORE FILLING OUT!
Page 5 of 15 pages
--------------------------------------- --------------------------------------- CUSIP No. 21887F 10 0 13G Page 6 of 15 Pages ----------- --------------------------------------- --------------------------------------- ---------- ------------------------------------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSONS S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS Wallace R. Hawley (a General Partner of InterWest Management Partners V, LP) ---------- ------------------------------------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) |_| (b) |X| ---------- ------------------------------------------------------------------------------------------------------------- 3 SEC USE ONLY ---------- ------------------------------------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION United States ------------------------------ -------- -------------------------------------------------------------------------------- 5 SOLE VOTING POWER NUMBER OF 54,761 SHARES -------- -------------------------------------------------------------------------------- BENEFICIALLY 6 SHARED VOTING POWER OWNED BY EACH REPORTING PERSON WITH 504,654 -------- -------------------------------------------------------------------------------- 7 SOLE DISPOSITIVE POWER 54,761 -------- -------------------------------------------------------------------------------- 8 SHARED DISPOSITIVE POWER 504,654 ---------- ------------------------------------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 559,415 ---------- ------------------------------------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* ---------- ------------------------------------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 1.4% ---------- ------------------------------------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON* IN ---------- ------------------------------------------------------------------------------------------------------------- *SEE INSTRUCTION BEFORE FILLING OUT!
Page 6 of 15 pages
--------------------------------------- --------------------------------------- CUSIP No. 21887F 10 0 13G Page 7 of 15 Pages ----------- --------------------------------------- --------------------------------------- ---------- ------------------------------------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSONS S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS W. Scott Hedrick (a General Partner of InterWest Management Partners V, LP) ---------- ------------------------------------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) |_| (b) |X| ---------- ------------------------------------------------------------------------------------------------------------- 3 SEC USE ONLY ---------- ------------------------------------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION United States ------------------------------ -------- -------------------------------------------------------------------------------- 5 SOLE VOTING POWER NUMBER OF 82,052 SHARES -------- -------------------------------------------------------------------------------- BENEFICIALLY 6 SHARED VOTING POWER OWNED BY EACH REPORTING PERSON WITH 504,654 -------- -------------------------------------------------------------------------------- 7 SOLE DISPOSITIVE POWER 82,052 -------- -------------------------------------------------------------------------------- 8 SHARED DISPOSITIVE POWER 504,654 ---------- ------------------------------------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 586,706 ---------- ------------------------------------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* ---------- ------------------------------------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 1.5% ---------- ------------------------------------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON* IN ---------- ------------------------------------------------------------------------------------------------------------- *SEE INSTRUCTION BEFORE FILLING OUT!
Page 7 of 15 pages
--------------------------------------- --------------------------------------- CUSIP No. 21887F 10 0 13G Page 8 of 15 Pages ----------- --------------------------------------- --------------------------------------- ---------- ------------------------------------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSONS S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS W. Stephen Holmes (a General Partner of InterWest Management Partners V, LP) ---------- ------------------------------------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) |_| (b) |X| ---------- ------------------------------------------------------------------------------------------------------------- 3 SEC USE ONLY ---------- ------------------------------------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION United States ------------------------------ -------- -------------------------------------------------------------------------------- 5 SOLE VOTING POWER NUMBER OF 28,058 SHARES -------- -------------------------------------------------------------------------------- BENEFICIALLY 6 SHARED VOTING POWER OWNED BY EACH REPORTING PERSON WITH 504,654 -------- -------------------------------------------------------------------------------- 7 SOLE DISPOSITIVE POWER 28,058 -------- -------------------------------------------------------------------------------- 8 SHARED DISPOSITIVE POWER 504,654 ---------- ------------------------------------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 532,712 ---------- ------------------------------------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* ---------- ------------------------------------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 1.3% ---------- ------------------------------------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON* IN ---------- ------------------------------------------------------------------------------------------------------------- *SEE INSTRUCTION BEFORE FILLING OUT!
Page 8 of 15 pages
--------------------------------------- --------------------------------------- CUSIP No. 21887F 10 0 13G Page 9 of 15 Pages ----------- --------------------------------------- --------------------------------------- ---------- ------------------------------------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSONS S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS Robert R. Momsen (a General Partner of InterWest Management Partners V, LP) ---------- ------------------------------------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) |_| (b) |X| ---------- ------------------------------------------------------------------------------------------------------------- 3 SEC USE ONLY ---------- ------------------------------------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION United States ------------------------------ -------- -------------------------------------------------------------------------------- 5 SOLE VOTING POWER NUMBER OF 97,052 SHARES -------- -------------------------------------------------------------------------------- BENEFICIALLY 6 SHARED VOTING POWER OWNED BY EACH REPORTING PERSON WITH 504,654 -------- -------------------------------------------------------------------------------- 7 SOLE DISPOSITIVE POWER 97,052 -------- -------------------------------------------------------------------------------- 8 SHARED DISPOSITIVE POWER 504,654 ---------- ------------------------------------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 601,706 ---------- ------------------------------------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* ---------- ------------------------------------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 1.5% ---------- ------------------------------------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON* IN ---------- ------------------------------------------------------------------------------------------------------------- *SEE INSTRUCTION BEFORE FILLING OUT!
Page 9 of 15 pages
--------------------------------------- --------------------------------------- CUSIP No. 21887F 10 0 13G Page 10 of 15 Pages ----------- --------------------------------------- --------------------------------------- ---------- ------------------------------------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSONS S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS Arnold L. Oronsky (a General Partner of InterWest Management Partners V, LP) ---------- ------------------------------------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) |_| (b) |X| ---------- ------------------------------------------------------------------------------------------------------------- 3 SEC USE ONLY ---------- ------------------------------------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION United States ------------------------------ -------- -------------------------------------------------------------------------------- 5 SOLE VOTING POWER NUMBER OF 92,811 SHARES -------- -------------------------------------------------------------------------------- BENEFICIALLY 6 SHARED VOTING POWER OWNED BY EACH REPORTING PERSON WITH 501,500 -------- -------------------------------------------------------------------------------- 7 SOLE DISPOSITIVE POWER 92,811 -------- -------------------------------------------------------------------------------- 8 SHARED DISPOSITIVE POWER 501,500 ---------- ------------------------------------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 594,311 ---------- ------------------------------------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* ---------- ------------------------------------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 1.5% ---------- ------------------------------------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON* IN ---------- ------------------------------------------------------------------------------------------------------------- *SEE INSTRUCTION BEFORE FILLING OUT!
Page 10 of 15 pages Item 1. (a) Name of Issuer: Corixa Corporation ("Issuer") (b) Address of Issuer's Principal Executive Offices: 1124 Columbia Street, Suite 200 Seattle, WA 98104 Item 2. (a) Name of Person(s) Filing: InterWest Partners V, LP ("IWP V") InterWest Management Partners V, LP ("IMP V") Alan W. Crites ("Crites") Philip T. Gianos ("Gianos") Wallace R. Hawley ("Hawley") W. Scott Hedrick ("Hedrick") W. Stephen Holmes ("Holmes") Robert R. Momsen ("Momsen") Arnold L. Oronsky ("Oronsky") (b) Address of Principal Business Office or, if none, Residence: 3000 Sand Hill Road Building 3, Suite 255 Menlo Park, CA 94025 (c) Citizenship/Place of Organization: IWP V: California IMP V: California Crites: United States Gianos: United States Hawley: United States Hedrick: United States Holmes: United States Momsen: United States Oronsky: United States (d) Title of Class of Securities: Common Stock (e) CUSIP Number: 21887F 10 0 Item 3. Not applicable. Page 11 of 15 pages Item 4. Ownership.
======= ============ ========= =========== ========== ============ =========== =========== =========== ============ IWP V IMP V Crites Gianos Hawley Hedrick Holmes Momsen Oronsky ------- ------------ --------- ----------- ---------- ------------ ----------- ----------- ----------- ------------ (a) Beneficial Ownership 501,500 566,803*** 558,140 559,415*** 586,706*** 532,712*** 601,706*** 594,311 ------- ------------ --------- ----------- ---------- ------------ ----------- ----------- ----------- ------------ (b) Percentage of Class 1.2% 1.4% 1.4% 1.4% 1.5% 1.3% 1.5% 1.5% ------- ------------ --------- ----------- ---------- ------------ ----------- ----------- ----------- ------------ (c) Sole Voting Power 501,500 62,149 56,640 54,761 82,052 28,058 97,052* 92,811** ------- ------------ --------- ----------- ---------- ------------ ----------- ----------- ----------- ------------ Shared Voting Power 0 504,654*** 501,500 504,654*** 504,654*** 504,654*** 504,654*** 501,500 ------- ------------ --------- ----------- ---------- ------------ ----------- ----------- ----------- ------------ Sole Dispositive Power 501,500 62,149 56,640 54,761 82,052 28,058 97,052* 92,811** ------- ------------ --------- ----------- ---------- ------------ ----------- ----------- ----------- ------------ Shared Dispositive Power 0 504,654*** 501,500 504,654*** 504,654*** 504,654*** 504,654*** 501,500 ======= ============ ========= =========== ========== ============ =========== =========== =========== ============ *Momsen includes options exercisable through 3/1/01 representing 15,878 shares of common stock. **Oronsky includes options exercisable through 3/1/01 representing 30,417 shares of common stock. ***Includes 3,154 shares of Issuer's Common stock held by InterWest Investors V, a general partnership, of which Crites, Hawley, Hedrick, Holmes and Momsen are general partners
Item 5. Ownership of Five Percent or Less of a Class This statement is being filed to report the fact that as of the date hereof the Reporting Persons have ceased to be the beneficial owners of more than five percent of the class of securities. Item 6. Ownership of More than Five Percent on Behalf of Another Person Under certain circumstances set forth in the partnership agreement of IMP V, the general partners and/or limited partners of such partnership have the right to receive dividends from, or the proceeds from the sale of, the Common Stock of Issuer beneficially owned by such Partnership. Item 7. Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on By the Parent Holding Company. Not applicable. Item 8. Identification and Classification of Members of the Group No reporting person is a member of a group as defined in section 240.13d-1(b)(1)(iii)(H) of the Act. Page 12 of 15 pages Item 9. Notice of Dissolution of Group Not applicable. Item 10. Certification Not applicable EXHIBITS A. Joint Filing Statement Page 13 of 15 pages Signature After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct. Date: February ____, 2001 INTERWEST PARTNERS V, LP By: InterWest Management Partners V, LP -------------------------------- Alan W. Crites By: ------------------------- General Partner -------------------------------- Philip T. Gianos INTERWEST MANAGEMENT PARTNERS V, LP -------------------------------- By: Wallace R. Hawley ----------------------------- General Partner -------------------------------- W. Scott Hedrick -------------------------------- W. Stephen Holmes -------------------------------- Robert R. Momsen -------------------------------- Arnold L. Oronsky Page 14 of 15 pages EXHIBIT A We, the undersigned, hereby express our agreement that the attached Schedule 13G is filed on behalf of each of us. Date: February ____, 2001 INTERWEST PARTNERS V, LP By: InterWest Management Partners V, LP -------------------------------- Alan W. Crites By: ------------------------- General Partner -------------------------------- Philip T. Gianos INTERWEST MANAGEMENT PARTNERS V, LP -------------------------------- By: Wallace R. Hawley ----------------------------- General Partner -------------------------------- W. Scott Hedrick -------------------------------- W. Stephen Holmes -------------------------------- Robert R. Momsen -------------------------------- Arnold L. Oronsky Page 15 of 15 pages