1. Department of Psychology, University of Maryland, College Park, MD, USA
2. Division of General Internal Medicine, Department of Medicine, University of Washington, Seattle, Washington, USA
3. Department of Behavioral and Community Health, University of Maryland, College Park, MD, USA
4. Alcohol, Tobacco and Other Drug Research Unit, South African Medical Research Council, Parow, South Africa
5. Division of Infectious Diseases, Medical Practice Evaluation Center, Massachusetts General Hospital/Harvard Medical School, Boston, Massachusetts, USA
6. HIV Mental Health Research Unit, Department of Psychiatry and Mental Health, University of Cape Town, Cape Town, South Africa
7. Curtin EnAble Institute, Curtin University, Perth, Western Australia, Australia