1 Cochrane South Africa, South African Medical Research Council, Cape Town, South Africa; School of Public Health and Family Medicine, Faculty of Health Sciences, University of Cape Town, South Africa. Electronic address: Sara.Cooper@mrc.ac.za.
2 Cochrane South Africa, So uth African Medical Research Council, Cape Town, South Africa; School of Public Health and Family Medicine, Faculty of Health Sciences, University of Cape Town, South Africa; Department of Global Health, Faculty of Medicine and Health Sciences, Stellenbosch University, Cape Town, South Africa. Electronic address: Charles.Wiysonge@mrc.ac.za.