1. Health Economics and HIV and AIDS Research Division (HEARD), University of KwaZulu-Natal, Durban 4041, South Africa
2. Division of Social Medicine and Global Health, Lund University, 223 63 Lund, Sweden
3. Research Unit, Foundation for Professional Development, East London 5241, South Africa
4. School of Nursing & Public Health, University of KwaZulu-Natal, Durban 4041, South Africa
5. South African Research Ethics Training Initiative, School of Applied Human Sciences, University of KwaZulu-Natal, Pietermaritzburg 3209, South Africa