1 Division of Epidemiology and Biostatistics, School of Public Health and Family Medicine, University of Cape Town, Cape Town 7925, South Africa; Cochrane South Africa, South African Medical Research Council, Cape Town, South Africa. Electronic address: nnjchu001@myuct.ac.za.
2 Cochrane South Africa, South African Medical Research Council, Cape Town, South Africa.
3 Division of Epidemiology and Biostatistics, School of Public Health and Family Medicine, University of Cape Town, Cape Town 7925, South Africa.
4 Western Cape Provincial Department of Health, Cape Town, South Africa; Division of Health Systems and Public Health, Department of Global Health, Stellenbosch University, Cape Town, South Africa.
5 Division of Epidemiology and Biostatistics, School of Public Health and Family Medicine, University of Cape Town, Cape Town 7925, South Africa; Cochrane South Africa, South African Medical Research Council, Cape Town, South Africa; Division of Epidemiology and Biostatistics, Department of Global Health, Stellenbosch University, Cape Town, South Africa.