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Patrick J. Zenner was named Chairman of the Board in May 2004 and has been a director since 2002. A 32-year veteran of the pharmaceutical industry, Patrick Zenner retired in 2001 from the position of President and Chief Executive Officer of Hoffmann-La Roche Inc., North America. Hoffmann-La Roche Inc., based in Nutley, N.J., is the prescription drug unit of the Roche Group. Mr. Zenner is currently on the Board of Trustees of Creighton University and is Chairman of the Board of Trustees of Fairleigh Dickinson University. In addition, Mr. Zenner is a member on the Boards of Directors of CuraGen Corporation, Praecis Pharmaceuticals Inc., Geron Corporation, Sciele Pharma, Inc., Xoma Ltd., West Pharmaceutical Services and Exact Sciences, Inc. | 