1. Department of Pediatrics and
2. Department of Microbiology and Immunology, Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN;
3. Experimental Transplantation and Immunology Branch, National Cancer Institute, Center for Cancer Research, National Institutes of Health, Bethesda, MD;
4. Center for Cancer and Immunology Research, Children's National Health System, Washington, DC; and
5. Department of Microbiology, Immunology and Tropical Medicine, The George Washington University, Washington, DC