[1] MRC, Hlth Syst Res Unit, Cape Town, South Africa
[2] MRC, Burden Dis Unit, Cape Town, South Africa
[3] Univ Western Cape, Sch Publ Hlth, Cape Town, South Africa
[4] Saving Newborn Lives Save Children, Cape Town, South Africa
[5] Univ Witwatersrand, Sch Publ Hlth, Johannesburg, South Africa
[6] Univ Witwatersrand, Reprod Hlth & HIV Res Unit, Johannesburg, South Africa
[7] Univ Kwazulu Natal, Ctr AIDS Programme Res S Africa, Durban, South Africa
[8] Univ Kwazulu Natal, Nelson Mandela Sch Med, Durban, South Africa
[9] Columbia Univ, Dept Epidemiol, New York, NY USA
[10] MRC, Gender & Hlth Res Unit, Pretoria, South Africa
[11] Univ Cape Town, Div Child & Adolescent Psychiat, ZA-7925 Cape Town, South Africa
[12] Univ Cape Town, Adolescent Hlth Res Unit, ZA-7925 Cape Town, South Africa
[13] Univ Cape Town, Dept Med, ZA-7925 Cape Town, South Africa
[14] Aurum Inst Hlth Res, Johannesburg, South Africa