1. Department of Social Policy and Intervention, University of Oxford, Oxford, United Kingdom
2. School of Social and Political Science, University of Edinburgh, Edinburgh, United Kingdom
3. Optentia, Faculty of Health Sciences, North-West University, Vanderbijlpark, South Africa
4. Department of Sociology, University of Cape Town, Cape Town, South Africa
5. Centre for Social Science Research, University of Cape Town, Cape Town, South Africa
6. Institute for Global Health, University College London, London, United Kingdom
7. Department of Infectious Disease Epidemiology, London School of Hygiene & Tropical Medicine, London, United Kingdom
8. Department of Psychiatry, University of Cape Town, Cape Town, South Africa