1. Pediatric HIV Services, Jacobi Medical Center, Bronx, New York 10461
2. Harvard School of Public Health, Boston, Massachusetts 02115
3. University of California, Los Angeles School of Medicine, Los Angeles, California 90095
4. Medical University of South Carolina, Charleston, South Carolina 29425
5. National Institute of Allergy and Infectious Diseases, NIH, Bethesda, Maryland 20892
6. National Institute of Child Health and Human Development, NIH, Bethesda, Maryland 20892
7. Johns Hopkins University, Baltimore, Maryland 21287
8. Children's Medical Center of Brooklyn, Brooklyn, New York 11203
9. Ramon Ruiz Aranu University Hospital, Bayamon, Puerto Rico 00956
10. University of Medicine and Dentistry of New Jersey, Newark, New Jersey 07103
11. University of Southern California School of Medicine, Los Angeles, California 90033
12. Metropolitan Hospital Center, New York, New York 10029
13. Harlem Hospital Center, New York, New York 10037
14. Howard University Hospital, Washington, DC 20060
15. George Washington University School of Medicine, Washington, DC 20010
16. SUNY Health Science Center at Stony Brook, Stony Brook, New York 11794