1. HIV and other Infectious Diseases Research Unit, South African Medical Research Council, Durban, South Africa
2. Kirby Institute, University of New South Wales, Kensington, Australia
3. Biostatistics Unit, South African Medical Research Council, Durban, South Africa
4. University of Lincoln, Lincoln Institute for Health, Lincoln, UK
5. Faculty of Infectious and Tropical Diseases (ITD), London School of Hygiene & Tropical Medicine, London, UK
6. Biostatistics Unit: GIS, South African Medical Research Council, Durban, South Africa
7. London School of Hygiene and Tropical Medicine, Department of Epidemiology and Population Health, London, UK
8. School of Medicine, Department of Global Health, University of Washington, Seattle, WA, USA
9. The Aurum Institute, Johannesburg, South Africa