1. Department of Transfusion Medicine, Cell Processing Section, Clinical Center, National Institutes of Health, Bethesda, MD;
2. Experimental Transplantation and Immunology Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD;
3. Dipartimento di Scienze Biomediche per la Salute, Università degli Studi di Milano, Milan, Italy; and
4. Pediatric Oncology Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD