1. Department of Oncology, Georgetown University Medical Center, and Vincent T. Lombardi Cancer Center, Washington, DC 20007.
2. Division of Hematology and Oncology, Bone Marrow Transplantation Program, Georgetown University Medical Center, and Vincent T. Lombardi Cancer Center, Washington, DC 20007.
3. Department of Microbiology and Immunology, Georgetown University Medical Center, and Vincent T. Lombardi Cancer Center, Washington, DC 20007