Charles R. Schaller
Former Founder and Chairman, Medarex, Inc.

Mr. Schaller is the Chairman of the Board of Directors of AVANT and was a director of Celldex since November 2006. Mr. Schaller has been a Director of Medarex, Inc. since 1987, and was Chairman of the Medarex Board of Directors from 1987 - 1997. Since 1989, Mr. Schaller has been a chemical industry management consultant and, until June 2002, he served as a director of AstroPower, Inc., a publicly traded U.S. manufacturer of photo-voltaic (PV) products. Mr. Schaller is a graduate of Yale University and is a graduate of the program in management development at Harvard Business School.

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