1. Centre for Evidence-Based Intervention, Department of Social Policy & Intervention, University of Oxford, Oxford, UK
2. OPTENTIA, School of Behavioural Sciences, North-West University, Vanderbijlpark, South Africa
3. Department of Psychiatry and Mental Health, University of Cape Town, Groote Schuur Hospital, Cape Town, South Africa
4. UNICEF Innocenti, Office of Research, Florence, Italy
5. Department of Anthropology, School of African & Gender Studies, Anthropology & Linguistics, University of Cape Town, Cape Town, South Africa
6. Research Department of Infection and Population Health, University College London, London, UK