1. Department of Obstetrics and Gynaecology and British Columbia Children's Hospital Research Institute University of British Columbia Vancouver British Columbia Canada
2. Department of Women and Children's Health, School of Life Course Sciences King's College London London UK
3. The Medical Research Council Unit The Gambia at the London School of Hygiene and Tropical Medicine Serekunda Gambia
4. School of Population and Public Health and Department of Pediatrics BC Children's and Women's Hospital and University of British Columbia Vancouver British Columbia Canada
5. Centro de Investigaciones Epidemiolóicas y Salud Púlica (CIESP‐IECS), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) Ciudad de Buenos Aires Argentina
6. Effective Care Research Unit Eastern Cape Department of Health and Universities of the Witwatersrand, Walter Sisulu and Fort Hare East London South Africa
7. Department of Obstetrics and Gynaecology University of Botswana Gaborone Botswana