1. Department of Psychology, School of Applied Human Sciences, University of KwaZulu-Natal, Durban, South Africa
2. Department of Medicine, Center for AIDS Prevention Studies, San Francisco, CA, USA
3. Anova Health Institute, Johannesburg, South Africa
4. School of Public Health & Family Medicine, University of Cape Town, Cape Town, South Africa
5. Division of Infectious Diseases & HIV Medicine, Department of Medicine, University of Cape Town, Cape Town, South Africa