[1] Harvard TH Chan Sch Publ Hlth, Dept Biostat, Boston, MA 02115 USA
[2] Harvard TH Chan Sch Publ Hlth, Ctr Biostat AIDS Res, 665 Huntington Ave,FXB 505, Boston, MA 02115 USA
[3] Northwestern Univ, Dept Psychiat & Behav Sci, Feinberg Sch Med, Chicago, IL USA
[4] Columbia Univ, Dept Psychiat, HIV Ctr Clin & Behav Studies, Irving Med Ctr, New York, NY USA
[5] Univ Illinois, Dept Pediat, Chicago, IL USA
[6] Childrens Diagnost & Treatment Ctr, Res Dept, Ft Lauderdale, FL USA
[7] Harvard TH Chan Sch Publ Hlth, Dept Epidemiol, Boston, MA 02115 USA
[8] Eunice Kennedy Shriver Natl Inst Child Hlth & Hum, Maternal & Pediat Infect Dis Branch, Bethesda, MD USA
[9] Baylor Coll Med, Dept Pediat, Retrovirol, Houston, TX 77030 USA
[10] NIMH, Div AIDS Res, NIH, Bethesda, MD 20892 USA
[11] Ann & Robert H Lurie Childrens Hosp Chicago, Chicago, IL 60611 USA
[12] Baylor Coll Med, Houston, TX 77030 USA
[13] Bronx Lebanon Hosp Ctr, Bronx, NY 10456 USA
[14] Childrens Diagnost & Treatment Ctr, Ft Lauderdale, FL USA
[15] Boston Childrens Hosp, Boston, MA USA
[16] Jacobi Med Ctr, New York, NY USA
[17] Rutgers New Jersey Med Sch, Newark, NJ USA
[18] St Christophers Hosp Children, Philadelphia, PA 19133 USA
[19] St Jude Childrens Res Hosp, 332 N Lauderdale St, Memphis, TN 38105 USA
[20] San Juan Hosp, Dept Pediat, San Juan, PR USA
[21] Tulane Univ, Sch Med, New Orleans, LA 70118 USA
[22] Univ Calif San Diego, San Diego, CA 92103 USA
[23] Univ Colorado, Denver Hlth Sci Ctr, Denver, CO 80202 USA
[24] Univ Miami, Coral Gables, FL 33124 USA