[1] Univ Cape Town, Dept Med, Desmond Tutu HIV Ctr, Cape Town, South Africa
[2] Populat Council, New York, NY USA
[3] RTI Int, Womens Global Hlth Imperat, San Francisco, CA USA
[4] UZ UCSF Collaborat Res Programme, Harare, Zimbabwe
[5] Univ Calif San Francisco, Ctr AIDS Prevent Studies, San Francisco, CA 94143 USA