1. MRC/UVRI and LSHTM Uganda Research Unit, Entebbe, Uganda
2. MRC Tropical Epidemiology Group, London School of Hygiene & Tropical Medicine, London, UK
3. Department of Global Health and Development, Faculty of Public Health and Policy, London School of Hygiene & Tropical Medicine, London, UK
4. Mwanza Intervention Trials Unit, National Institute for Medical Research, Dar es Salaam, Tanzania
5. Department of Infectious Diseases Epidemiology, London School of Hygiene & Tropical Medicine, London, UK
6. Humanitarian and Conflict Response Institute, University of Manchester, Manchester, UK