1. Division of Infectious Diseases, University of North Carolina at Chapel Hill, North Carolina, USA, Department of Medicine, Faculty of Health Sciences, Health Economics and Epidemiology Research Office, University of the Witwatersrand, Johannesburg,
Right to Care, Johannesburg
2. Right to Care, Johannesburg, Clinical HIV Research Unit, Department of Medicine, Faculty of Health Sciences
3. National Institute for Communicable Diseases/National Health Laboratory Service and Department of Clinical Microbiology and Infectious Diseases, University of the Witwatersrand, Johannesburg, South Africa
4. Clinical HIV Research Unit, Department of Medicine, Faculty of Health Sciences, Department of Medicine, Infectious Disease Division, University of Colorado, Denver, Colorado
5. Section of Infectious Diseases, Boston University School of Medicine, Boston, Massachusetts
6. Department of Epidemiology, Boston University School of Public Health, Boston, Massachusetts
7. Department of Medicine, Division of Infectious Diseases, Johns Hopkins University, Baltimore, Maryland, USA