[1] Univ Zimbabwe, Coll Hlth Sci, Clin Trials Unit, Harare, Zimbabwe
[2] Univ Washington, Dept Epidemiol, Seattle, WA 98195 USA
[3] Univ Washington, Dept Global Hlth, Seattle, WA 98195 USA
[4] Microbicide Trials Network, Seattle, WA USA
[5] Magee Womens Res Inst & Fdn, Obstet Gynecol & Reprod Serv, Pittsburgh, PA USA
[6] Johns Hopkins Univ, Makerere Univ, Kampala, Uganda
[7] Ctr AIDS Programme Res South Africa, Durban, South Africa
[8] Fred Hutchinson Canc Res Ctr, Vaccine & Infect Dis Div, 1124 Columbia St, Seattle, WA 98104 USA
[9] NIAID, Div Aids, Rockville, MD USA
[10] Univ Pittsburgh, Med Ctr, Reprod Infect Dis, Pittsburgh, PA USA