1. Africa Health Research Institute, Durban, KwaZulu-Natal, South Africa
2. Human and Social Development Research Programme, Human Sciences Research Council, Durban, South Africa
3. MRC Developmental Pathways to Health Research Unit, Department of Paediatrics, School of Clinical Medicine, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
4. Department of Psychiatry, University of Oxford, Oxford, UK
5. MRC/Wits Rural Public Health and Health Transitions Research Unit (Agincourt), School of Public Health, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
6. School of Demography, Australian National University, Canberra, Australia
7. Institute of Behavioural Science, University of Colorado at Boulder, Boulder, CO, USA
8. Centre for Academic Mental Health, University of Bristol, Bristol, UK
9. School of Public Health, University of the Witwatersrand, Johannesburg, South Africa
10. Global Health Research Institute, Human Development and Health, University of Southampton, UK and
11. Institute of Health and Wellbeing and Royal Hospital for Children, University of Glasgow, Glasgow, UK