Mr. Zenner has been a Director of the Company since 2002. From 1993 to 2001, Mr. Zenner served as the President and Chief Executive Officer of Hoffmann-La Roche, Inc. Mr. Zenner served in various other capacities with Hoffman-La Roche since 1969, including Senior Vice President of its pharmaceutical division from 1992 to 1993, as Head of International Pharmaceutical Marketing from 1988 to 1992 and as Vice President and General Manager of Roche Laboratories from 1982 to 1988. Mr. Zenner is currently a Director of Arqule, Inc., Dendrite International, EXACT Sciences, Inc., First Horizon Pharmaceuticals, Inc., Geron Corporation, West Pharmaceutical Services and Xoma Ltd. Mr. Zenner holds a B.S.B.A. from Creighton University and an M.B.A. from Fairleigh Dickinson University.
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