1. Department of Pediatrics and HIV Center, St. Luke's-Roosevelt Hospital Center, New York, NY
2. Department of Medicine, St. Luke's-Roosevelt Hospital Center, New York, NY
3. Body Composition Unit, Columbia University College of Medicine and School of Public Health, St. Luke's-Roosevelt Hospital Center, New York, NY
4. Department of Pediatrics, NY Medical College, Metropolitan Hospital Center
5. Clinical Research Center, University of Vermont, Burlington, VT