Corporate Governance

BOARD OF DIRECTORS ROBERT F. JOHNSTON Executive Chairman Founder and President, Johnston Associates Inc. ANTHONY B. EVNIN, PhD General Partner, Venrock Associates CHARLES W. NEWHALL, III Co-Founder and General Partner, New Enterprise Associates STEVEN LEVENTER, PhD Vice President, PharmaNet LLC

DOCUMENTS 1. Code of Ethics and Business Conduct (PDF*) 2. Corporate Governance Guidelines (PDF) 3. Audit Commitee, Amended and Restated Charter (PDF) 4. Governance and Nominating Committee, Charter (PDF) 5. Compensation Committee, Charter (PDF) 6. Shareholder Communications with Board of Directors (PDF)

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