1. Institute for Life Course Health Research, Department of Global Health, Stellenbosch University, Cape Town, South Africa
2. Institute for Global Health, University College London, London, UK
3. Amsterdam Institute for Social Science Research, Faculty of Social and Behavioural Sciences, University of Amsterdam, Amsterdam, Netherlands
4. Department of Social Policy & Intervention, University of Oxford, Oxford, UK
5. MRC-NRF Developmental Pathways to Health Research Unit, School of Clinical Medicine, University of Witwatersrand, Johannesburg, South Africa
6. School of Nursing and Midwifery, Queens University, Belfast, UK