1. School of Public Health, Faculty of Health Sciences, University of Witwatersrand, Johannesburg, South Africa
2. Genesis Analytics, Johannesburg, South Africa
3. Department of Health Behavior, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC, USA
4. Gender and Health Research Unit, South African Medical Research Council, Pretoria, South Africa
5. Centre for Rural Health, School of Nursing and Public Health, University of KwaZulu-Natal, Durban, South Africa
6. Department of Psychology, Faculty of Life and Health Sciences, University of Exeter, Exeter, UK
7. Institute of Global Health, University College London, London, UK
8. Department of Sexual and Reproductive Health, National Institute for Medical Research, Mwanza, Tanzania