[1] South African Med Res Council, Hlth Syst Res Unit, Cape Town, South Africa
[2] Univ Cape Town, Sch Publ Hlth & Family Med, Cape Town, South Africa
[3] Univ Sheffield, Sheffield Inst Int Dev, Sheffield, S Yorkshire, England
[4] Networking HIV & AIDS Community Southern Africa N, Cape Town, South Africa
[5] Univ Cape Town, Dept Psychol, Cape Town, South Africa
[6] Univ Cape Town, Div Child & Adolescent Psychiat, Cape Town, South Africa