Committee Composition

Overview of Committee Composition and Member Roles
Director Name	Audit Committee	Compensation Committee
Brian J. Brille Vice-Chair of the Board
Peter M. Castleman Lead DirectorIndependent Director	Member of the Audit CommitteeAudit Committee	Chairperson of the Compensation CommitteeCompensation Committee
David Fredrickson Independent Director
Joseph E. Gilliam Independent Director	Member of the Audit CommitteeAudit Committee	Member of the Compensation CommitteeCompensation Committee
Jon S. Halbert
David D. Halbert, DSc (h.c.) Chairman of the Board
Laura I. Johansen Independent Director		Member of the Compensation CommitteeCompensation Committee
Jonathan Knowles, PhD Vice-Chair of the BoardIndependent Director
Lloyd B. Minor, MD Independent Director
Danny Phillips Independent Director	Chairperson of the Audit CommitteeAudit Committee
George H. Poste, DVM, PhD, FRC Path, FRS Vice-Chair of the Board
Jeffrey Vacirca, MD, FACP Independent Director