1 Cochrane South Africa, South African Medical Research Council, 7501 Cape Town, South Africa; School of Public Health and Family Medicine, University of Cape Town, Cape Town, South Africa. Electronic address: sara.cooper@mrc.ac.za.
2 WHO Regional Office for Africa, Brazzaville, Congo.
3 Cochrane South Africa, South African Medical Research Council, 7501 Cape Town, South Africa.
4 Cochrane South Africa, South African Medical Research Council, 7501 Cape Town, South Africa; School of Public Health and Family Medicine, University of Cape Town, Cape Town, South Africa; Department of Global Health, Stellenbosch University, Cape Town, South Africa.