1. Makerere University, School of Public Health, Kampala, Uganda
2. Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
3. Department of Epidemiology and Biostatistics, Makerere University College of Health Sciences, Kampala, Uganda
4. The Chronic Diseases and Cancer Theme, Medical Research Council/Uganda Virus Research Institute and London School of Hygiene & Tropical Medicine Research Unit, Entebbe, Uganda