1 Maternal & Child Health Intervention Research Group, Faculty of Epidemiology & Population Health, London School of Hygiene & Tropical Medicine, London, UK.
2 Maternal & Child Health Intervention Research Group, Faculty of Epidemiology & Population Health, London School of Hygiene & Tropical Medicine, London, UK sunil.bhopal@newcastle.ac.uk.
3 Population Health Sciences Institute, Newcastle University, Newcastle upon Tyne, UK.
4 Epidemiology and Disease Control, School of Public Health, University of Ghana, Accra, Ghana.
5 Center for Community Based Research, Human Sciences Research Council, Pretoria, KwaZulu-Natal, South Africa.
6 SAMRC/WITS Developmental Pathways for Health Research Unit, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg-Braamfontein, Gauteng, South Africa.