1. Faculty of Public Health and Policy, London School of Hygiene & Tropical Medicine, London, UK
2. Medical Research Council Unit The Gambia at the London School of Hygiene & Tropical Medicine, Banjul, The Gambia, Center for International Health, Ludwig-Maximilians-University (LMU) Munich University Hospital, Munich, Germany
3. Medical Research Council Unit The Gambia at the London School of Hygiene & Tropical Medicine, Banjul, The Gambia
4. Division of Infectious Diseases and Tropical Medicine, Medical Centre of the University of Munich (LMU), Munich, Germany, German Centre for Infection Research (DZIF), Partner Site Munich, Munich, Germany
5. Health Economics and Epidemiology Research Office, Department of Internal Medicine, School of Clinical Medicine, University of the Witwatersrand, Johannesburg, South Africa
6. Department of Public Health Sciences, Karolinska Institute, Sweden
7. Aurum Institute, Johannesburg, South Africa