Edward P. Cohen is a professor in the Departments of Microbiology and Immunology and of Medicine@the University of Illinois College of Medicine in Chicago. He received his M.D. degree from Washington University in St. Louis. His primary research interest is the development of tumor vaccines that can be used in the treatment of cancer. Address for Cohen: Department of Microbiology and Immunology (m/c 790), University of Illinois College of Medicine, E-704 Medical Sciences Building, 835 South Wolcott Avenue, Chicago, IL 60612-7344.