1. Division of Epidemiology and Biostatistics, Department of Global Health, Faculty of Medicine and Health Sciences; Stellenbosch University; Cape Town South Africa
2. Cochrane Response; Cochrane; London UK
3. Department of HIV & Global Hepatitis Programme; World Health Organization; Geneva Switzerland
4. Desmond Tutu HIV Centre; University of Cape Town; Cape Town South Africa
5. Division of Clinical Pharmacology; University of Cape Town; Cape Town South Africa
6. Department of Clinical Sciences; Liverpool School of Tropical Medicine; Liverpool UK
7. Department of Clinical Epidemiology, Biostatistics and Bioinformatics; Amsterdam University Medical Centers, University of Amsterdam; Amsterdam Netherlands