1. Stroger Hospital of Cook County/CORE Center, Chicago, Illinois;
2. Division of Health Services Research, American Academy of Pediatrics, Elk Grove Village, Illinois;
3. American Academy of Pediatrics, Elk Grove Village, Illinois;
4. Boston University School of Medicine, Division of Infectious Diseases, Boston Medical Center, Boston, Massachusetts;
5. Department of Infectious Diseases, St Jude Children's Research Hospital, Memphis, Tennessee;
6. Departments of Pediatrics and Preventive Medicine, University of Tennessee Health Science Center, Memphis, Tennessee; and
7. Montefiore Medical Center Adolescent AIDS Program, Albert Einstein College of Medicine, New York, New York