1. Department of International Health, Johns Hopkins Bloomberg School of Public Health, 615 N Wolfe St, Baltimore, MD, USA
2. Department of Family Medicine, McGill University, 5858 Côte-des-Neiges, Montreal, QC, Canada
3. School of Public Health, University of the Western Cape, Robert Sobukwe Road, Bellville, Republic of South Africa
4. Department of Community Health Sciences and Women & Child Health Division, Aga Khan University, Stadium Road, Karachi, Pakistan
5. Department of Global Health and Development, London School of Hygiene and Tropical Medicine, London, UK
6. Global Public Health Directorate, Public Health England, 7th Floor Wellington House, 133–155 Waterloo Road, London, UK