[1] South African Med Res Council, Gender & Hlth Res Unit, Pretoria, South Africa
[2] Univ KwaZulu Natal, Ctr Rural Hlth, Sch Nursing & Publ Hlth, Durban, South Africa
[3] South African Med Res Council, Biostat Res Unit, Durban, South Africa
[4] Arab World Res & Dev AWRAD, Ramallah, Palestine
[5] South African Med Res Council, Off Execut Scientist, Pretoria, South Africa
[6] Univ Witwatersrand, Sch Publ Hlth, Johannesburg, South Africa