[1] Univ Cape Town, Dept Anthropol, Cape Town, South Africa
[2] TB HIV Care, 11 Adderley St, ZA-8001 Cape Town, South Africa
[3] South African Network People Who Use Drugs, 34 Constantia Rd, ZA-7800 Wynberg, South Africa
[4] Univ Pretoria, Dept Family Med, Pretoria, South Africa
[5] Univ Cape Town, Dept Med, Div Hepatol, Cape Town, South Africa
[6] Groote Schuur Hosp, Cape Town, South Africa