EX-99.1 2 0002.txt JOINT FILING AGREEMENT EXHIBIT 1 JOINT FILING AGREEMENT ---------------------- Pursuant to Rule 13d-1(k)(1)(iii), we the undersigned agree that the Schedule 13G, to which this Joint Filing Agreement is attached as Exhibit 1, is filed on behalf of each of us. Dated: February 13, 2001 MAYFIELD VI INVESTMENT PARTNERS A California Limited Partnership By: Mayfield VI Management Partners, a California Limited Partnership, Its General Partner By: /s/ James T. Beck ----------------------------------------- James T. Beck, Authorized Signatory MAYFIELD VI MANAGEMENT PARTNERS A California Limited Partnership By: /s/ James T. Beck ----------------------------------------- James T. Beck, Authorized Signatory MAYFIELD MEDICAL PARTNERS A California Partnership By: Mayfield VI Investment Partners, a California Limited Partnership, Its General Partner By: Mayfield VI Management Partners, a California Limited Partnership, Its General Partner By: /s/ James T. Beck ------------------------------------ James T. Beck, Authorized Signatory MAYFIELD ASSOCIATES FUND A California Limited Partnership By: /s/ James T. Beck ----------------------------------------- James T. Beck, Authorized Signatory F. GIBSON MYERS, JR. By: /s/ James T. Beck ----------------------------------------- James T. Beck, Attorney In Fact Page 17 of 32 pages. KEVIN A. FONG By: /s/ James T. Beck ----------------------------------------- James T. Beck, Attorney In Fact WILLIAM D. UNGER By: /s/ James T. Beck ----------------------------------------- James T. Beck, Attorney In Fact WENDELL G. VAN AUKEN, III By: /s/ James T. Beck ----------------------------------------- James T. Beck, Attorney In Fact MICHAEL J. LEVINTHAL By: /s/ James T. Beck ----------------------------------------- James T. Beck, Attorney In Fact A. GRANT HEIDRICH, III By: /s/ James T. Beck ----------------------------------------- James T. Beck, Attorney In Fact Page 18 of 32 pages.