[1] South African Med Res Council, Cochrane South Africa, Francie Van Zijl Dr, ZA-7501 Cape Town, South Africa
[2] Univ Cape Town, Fac Hlth Sci, Sch Publ Hlth & Family Med, Cape Town, South Africa
[3] Stellenbosch Univ, Fac Med & Hlth Sci, Dept Global Hlth, Cape Town, South Africa
[4] Human Sci Res Council, Impact Ctr, Pretoria, South Africa
[5] Univ Witwatersrand, Fac Hlth Sci, SAMRC Wits Dev Pathways Hlth Res Unit, Johannesburg, South Africa
[6] South African Med Res Council, HIV & Other Infect Dis Res Unit, Durban, South Africa