Committee Composition

	Audit Committee	Compensation Committee	Nominating and Corporate Governance Committee
Robert Adelman, M.D.		Compensation Committee
Kristina Burow		Compensation Committee	Nominating and Corporate Governance Committee
Carol Gallagher, Pharm.D.	Audit Committee		Nominating and Corporate Governance Committee
Andrew Guggenhime	Audit Committee
Richard Heyman, Ph.D.		Compensation Committee	Nominating and Corporate Governance Committee
John McHutchison, AO, M.D.		Compensation Committee
Amir Nashat, Ph.D.	Audit Committee

= Chairperson = Member = Chairman of the Board

Investor Relations