1. Faculty of Epidemiology and Population Health, Department of Infectious Disease Epidemiology, London School of Hygiene and Tropical Medicine, London, UK
2. Maternal, Adolescent, Reproductive & Child Health Centre, London School of Hygiene & Tropical Medicine, London, UK
3. Division of Data, Analytics, Planning and Monitoring, UNICEF, New York City, NY, USA
4. Global Surgery Division, Department of Surgery, University of Cape Town, Cape Town, South Africa
5. School of Public Health, University of the Western Cape, Cape Town, South Africa