1. Department of Medicine, New Somerset Hospital, Cape Town, South Africa;
2. Intensive Care Unit, Rob Ferreira Hospital, Mbombela, South Africa;
3. Department of Medicine, Kalafong Provincial Tertiary Hospital, Pretoria, South Africa;
4. Manguzi Hospital, Manguzi, South Africa;
5. Cochrane South Africa, South African Medical Research Council, Cape Town, South Africa;
6. Division of Epidemiology and Biostatistics, Centre for Evidence-based Health Care, Faculty of Medicine and Health Sciences, Stellenbosch University, Cape Town, South Africa;
7. Centre for Global Health Research, Kenya Medical Research Institute, Kisumu, Kenya; and
8. Division of Pulmonology, Department of Medicine, University of Cape Town Lung Institute, University of Cape Town, Cape Town, South Africa