1. Department of Microbiology and Immunology, and the Walther Oncology Center, Indiana University School of Medicine, Indianapolis, IN 46202 and the Walther Cancer Institute, Indianapolis, IN 46208.
2. Laboratory of Immunology and Hematopoiesis, Department of Pathobiology, Purdue Cancer Center, and the Biochemistry and Molecular Biology Program, Purdue University, West Lafayette, IN 47907.