AGREEMENT
EXHIBIT 99.1
AGREEMENT
Pursuant to Rule 13d-1(k)(1)
promulgated pursuant to the Securities Exchange Act of 1934, as amended, the undersigned agree that the attached Schedule 13D is being filed on behalf of each of the undersigned.
| by a General Partner VENROCK ASSOCIATES II, L.P., by a General Partner VENROCK ASSOCIATES III, L.P., by its General Partner, Venrock Management III
LLC VENROCK ENTREPRENEURS FUND, L.P., by its General Partner, Venrock Management LLC | ||
| By: |
/s/ ▇▇▇▇▇▇▇ ▇. ▇▇▇▇▇ | |
| As a General Partner or Member | ||
Dated: November 25, 2002
Page 22 of 22 pages