1. Health Economics Unit, School of Public Health and Family Medicine, Faculty of Health Sciences, University of Cape Town, Cape Town, Clinical HIV Research Unit, Department of Internal Medicine, Faculty of Health Sciences, University of the Witwatersrand,
Johannesburg
2. Clinical HIV Research Unit, Department of Internal Medicine, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, Department of Medicine, University of Colorado, Aurora, Colorado, USA
3. National TB Programme, South African National Department of Health, Pretoria
4. Clinical HIV Research Unit, Department of Internal Medicine, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg
5. Interactive Research & Development, Johannesburg, South Africa
6. Division of Infectious Diseases, School of Medicine, University of North Carolina, Chapel Hill, North Carolina, USA, Health Economics & Epidemiology Research Office, Department of Internal Medicine, Faculty of Health Sciences, University of
the Witwatersrand, Johannesburg, South Africa
7. Health Economics Unit, School of Public Health and Family Medicine, Faculty of Health Sciences, University of Cape Town, Cape Town