PHILADELPHIA--(BUSINESS WIRE)--The National Disease Research Interchange (NDRI) has appointed Hal E. Broxmeyer, Ph.D., as Board Chairman effective January 1, 2007. Dr. Broxmeyer, a leading researcher in the cause of blood-related disorders, is Chairman of the Department of Microbiology and Immunology and Scientific Director of the Walther Oncology Center of the Indiana University School of Medicine, Indianapolis. He succeeds outgoing Chairman D. Walter Cohen, D.D.S., Chancellor Emeritus of the Drexel University College of Medicine, Philadelphia.