1 Centre for Evidence-based Health Care, Faculty of Medicine and Health Sciences, Stellenbosch University, Cape Town, South Africa. charlesw@sun.ac.za charlesw@sun.ac.za charlesw@sun.ac.za Tamara.Kredo@mrc.ac.za dosiemo@chak.or.ke andrew.boulle@uct.ac.za.
2 Centre for Evidence-based Health Care, Stellenbosch University, Cape Town, South Africa; South African Cochrane Centre, South African Medical Research Council, Cape Town, South Africa.
3 South African Cochrane Centre, South African Medical Research Council, Cape Town, South Africa.
4 Christian Health Association of Kenya, Nairobi, Kenya.
5 Centre for Infectious Disease Epidemiology and Research, University of Cape Town, Cape Town, South Africa and andrew.boulle@uct.ac.za.
6 HIV/AIDS Department, World Health Organization, Geneva, Switzerland.