1. Faculty of Infectious and Tropical Diseases London School of Hygiene and Tropical Medicine London United Kingdom
2. Centre for Sexual Health and HIV/AIDS Research (CeSHHAR) Zimbabwe Harare Zimbabwe
3. Faculty of Epidemiology and Population Health London School of Hygiene and Tropical Medicine London United Kingdom
4. Faculty of Public Health and Policy London School of Hygiene and Tropical Medicine London United Kingdom
5. Department of International Public Health Liverpool School of Tropical Medicine Liverpool United Kingdom