1. From the HIV and AIDS Malignancy Branch, National Cancer Institute, Bethesda, Maryland; the
2. University of Florida, Gainesville, Florida; the
3. University of South Florida, All Children's Hospital, St. Petersburg, Florida;
4. Merck Research Laboratories, Rahway, New Jersey; the
5. Biostatistics and Data Management Section, National Cancer Institute, Bethesda, Maryland; the
6. Pediatric Oncology Branch, National Cancer Institute, Bethesda, Maryland; and the
7. Pharmacy Department, National Institutes of Health, Bethesda, Maryland.