1. Wits Reproductive Health & HIV Institute, School of Clinical Medicine, University of the Witwatersrand, Hillbrow Health Precinct, Johannesburg, South Africa
2. Population Health, Health Systems & Innovation (PHHSI), Human Sciences Research Council (HSRC), Cape Town, South Africa
3. Department of Family Studies, University of the Western Cape, Cape Town, South Africa
4. ARCH Actuarial Consulting, Cape Town, South Africa
5. Department of Psychology, University of the Western Cape, Cape Town, South Africa