The following institutions and individuals participated in the PACTG Protocol 219C, in order of enrollment: Baylor Texas Children's Hospital: F. Minglana, M.E. Paul, and C.D. Jackson; University of Florida, Jacksonville: M.H. Rathore, A. Khayat, K. Champion, and S. Cusic; Chicago Children's Memorial Hospital: R. Yogev and E. Chadwick; University of Puerto Rico, University Children's Hospital AIDS Program: I. Febo-Rodriguez and S. Nieves; Bronx Lebanon Hospital Center: M. Purswani, S. Baksi, E. Stuard, and M. Dummit; San Juan Hospital: M. Acevedo, M. Gonzalez, L. Fabregas, and M.E. Texidor; University of Miami: G.B. Scott, C.D. Mitchell, L. Taybo, and S. Willumsen; University of Medicine and Dentistry of New Jersey: L. Bettica, J. Amour, B. Dashefsky, and J. Oleske; Charity Hospital of New Orleans and Earl K. Long Early Intervention Clinic: M. Silio, T. Alchediak, C. Boe, and M. Cowie; University of California San Diego Mother, Child, and Adolescent HIV Program: S.A. Spector, R. Viani, M. Caffery, and L. Proctor; Howard University: S. Rana, D. Darbari, J.C. Roa, and P.H. Yu; Jacobi Medical Center: M. Donovan, R. Serrano, M. Burey, and R. Auguste; St Christopher's Hospital for Children, Philadelphia: J. Chen and J. Foster; Baystate Medical Center Children's Hospital: B.W. Stechenberg, D.J. Fisher, A.M. Johnston, and M. Toye; Los Angeles County Medical Center/University of Southern California: J. Homans, M. Neely, L.S. Spencer, and A. Kovacs; Children's Hospital Boston: S. Burchett and N. Karthas; Children's Hospital of Michigan: E. Moore and C. Cromer; St Jude Children's Research Hospital, Memphis: P.M. Flynn, N. Patel, M. Donohoe, and S. Jones; New York University School of Medicine/Bellevue Hospital: W. Borkowsky, S. Chandwani, N. Deygoo, and S. Akleh; Children's Hospital at Downstate: E. Handelsman, H.J. Moallem, D.M. Swindell, and J.M. Kaye; Columbia Presbyterian Medical Center and Cornell University New York Presbyterian Hospital: A. Higgins, M. Foca, P. LaRussa, and A. Gershon; Children's Hospital of Philadelphia: R.M. Rutstein, C.A. Vincent, S.D. Douglas, and G.A. Koutsoubis; Children's Hospital of Oakland: A. Petru and T. Courville; University of California San Francisco, Moffitt Hospital: D. Wara and D. Trevithick; Children's Hospital, University of Colorado, Denver: E. McFarland and C. Salbenblatt; Johns Hopkins University Pediatrics: N. Hutton, B. Griffith, M. Joyner, and C. Kiefner; Children's Hospital and Regional Medical Center, Washington: M. Acker, R. Croteau, C. McLellan, and K. Mohan; Metropolitan Hospital Center: M. Bamji, I. Pathak, S. Manwani, and E. Patel; Children's National Medical Center: H. Spiegel and V. Amos; University of Massachusetts Medical School: K. Luzuriaga and A. Sharples; University of Alabama at Birmingham: R. Pass and M. Crain; University of Maryland Medical Center: J. Farley and K. Klipner; Schneider Children's Hospital: V.R. Bonagura, S.J. Schuval, C. Colter, and L. Campbell; Boston Medical Center: S.I. Pelton and A.M. Reagan; University of Illinois: K.C. Rich, K. Hayani, and M. Bicchinella; State University of New York Stony Brook: S. Nachman, D. Ferraro, and S. Madjar; North Broward Hospital District: A. Puga; Duke University: F. Wiley, K. Whitfield, O. Johnson, and R. Dizney; Harlem Hospital: S. Champion, M. Frere, M. DiGrado, and E.J. Abrams; Cook County Hospital: J. Martinez; University of South Alabama: M. Mancao; Connecticut Children's Medical Center: J. Salazar and G. Karas; University of North Carolina at Chapel Hill: T. Belho, B. Pitkin, and J. Eddleman; Ruiz Arnau University Hospital: W. Figueroa and E. Reyes; State University of New York Upstate Medical University: L.B. Weiner, K.A. Contello, W.A. Holz, and M.J. Famiglietti; Children's Medical Center of Dallas; University of Florida at Gainesville: R. Lawrence, J. Lew, C. Delany, and C. Duff; Children's Hospital at Albany Medical Center: A.D. Fernandez, P.A. Hughes, N. Wade, and M.E. Adams; Lincoln Medical and Mental Health Center and Phoenix Children's Hospital: J.P. Piatt, J. Foti, and L. Clarke-Steffen; Public Health Unit of Palm Beach County: J. Sleasman and C. Delaney; Medical College of Georgia: C.S. Mani; Yale University School of Medicine: W.A. Andiman, S. Romano, L. Hurst, and J. de Jesus; Vanderbilt University Medical Center: G. Wilson; University of Rochester Medical Center: G.A. Weinberg, F. Gigliotti, B. Murante, and S. Laverty; St. Joseph's Hospital and Medical Center, New Jersey: N. Hutchcon and A. Townley; Emory University Hospital: S. Nesheim and R. Dennis; University of South Florida: P. Emmanuel, J. Lujan-Zilberman, C. Graisberry, and S. Moore; Children's Hospital of the King's Daughters: R.G. Fisher, K.M. Cunnion, T.T. Rubio, and D. Sandifer; Medical University of South Carolina: G.M. Johnson; University of Mississippi Medical Center: H. Gay and S. Sadler; Harbor-University of California Los Angeles Medical Center: M. Keller, J. Hayes, A. Gagajena, and C. Mink; Mount Sinai Medical Center: D. Johnson; Children's Hospital of Los Angeles: J. Church, T. Dunaway, and C. Salata; Long Beach Memorial: A. Deveikis and L. Melton; Robert Wood Johnson Medical School: S. Gaur, P. Whitley-Williams, A. Malhotra, and L. Cerracchio; Sinai Children's Hospital: M. Dolan, J. D'Agostino, and R. Posada; Medical Center, Pediatric Columbus, Georgia: C. Mani and S. Cobb; Medical College of Virginia: S.R. Lavoie and T.Y. Smith; Cooper Hospital-University Medical Center: A. Feingold and S. Burrows-Clark; University of Cincinnati: J. Mrus and R. Beiting; Columbus Children's Hospital: M. Brady, J. Hunkler, and K. Koranyi; Sacred Heart Children's Medical Services of Florida: W. Albritton; St Luke's/Roosevelt Hospital Center: R. Warford and S. Arpadi; Incarnation Children's Center, New York: A. Gershon and P. Miller; Montefiore Medical-Albert Einstein College of Medicine: A. Rubinstein and G. Krienik; Children's Hospital of Los Angeles: A. Kovacs and E. Operskalski; San Francisco General Hospital: D. Wara, A. Kamrin, and S. Farrales; Cornell University New York Presbyterian: R. Johan-Liang and K. O'Keefe; St. Louis Children's Hospital: K.A. McGann, L. Pickering, and G.A. Storch; North Shore University Hospital: S. Pahwa and L. Rodriquez; and Oregon Health and Science University: P. Lewis and R. Croteau.
We are grateful for the contributions of Joyce Kraimer, Barbara Heckman, Shirley Traite, and Nathan Tryon. We also thank the children and families for their participation in PACTG 219C and the individuals and institutions involved in the conduct of 219C.