[1] Columbia Univ, Dept Psychiat, HIV Ctr Clin & Behav Studies, New York State Psychiat Inst, New York, NY USA
[2] Columbia Univ, Vagelos Coll Phys & Surg, New York, NY USA
[3] Columbia Univ, Mailman Sch Publ Hlth, Dept Sociomed Sci, New York, NY USA
[4] Columbia Univ, Mailman Sch Publ Hlth, ICAP, New York, NY USA
[5] Univ Cape Town, Sch Publ Hlth & Family Med, Div Epidemiol & Biostat, Cape Town, South Africa
[6] Brown Univ, Dept Hlth Serv Policy & Practice, Sch Publ Hlth, Providence, RI 02912 USA
[7] Eunice Kennedy Shriver Natl Inst Child Hlth & Hum, Bethesda, MD USA
[8] Natl STI HIV AIDS Control Program, Maputo, Mozambique
[9] Columbia Univ, Dept Pediat, Vagelos Coll Phys & Surg, New York, NY 10027 USA
[10] Columbia Univ, Aaron Diamond AIDS Res Ctr, New York, NY USA