University of Toronto, Partners for Health Development in Africa (PHDA), University of Toronto, University of Toronto, Partners for Health Development in Africa (PHDA), Partners for Health Development in Africa (PHDA), Independent, Partners for Health Development in Africa (PHDA), Partners for Health Development in Africa (PHDA), Partners for Health Development in Africa (PHDA), Partners for Health Development in Africa (PHDA), London School of Hygiene & Tropical Medicine - MRC International Statistics and Epidemiology Group, London School of Hygiene & Tropical Medicine - Department of Global Health and Development, London School of Hygiene & Tropical Medicine, University of Nairobi - Institute for Tropical and Infectious Diseases, London School of Hygiene & Tropical Medicine - Department of Global Health and Development and University of Toronto - University Health Network