1. Department of Psychology University of Maryland College Park MD USA
2. HIV Mental Health Research Unit Division of Neuropsychiatry Department of Psychiatry and Mental Health Groote Schuur Hospital Cape Town South Africa
3. Alcohol, Tobacco and Other Drug Research Unit South African Medical Research Council Division of Addiction Psychiatry Department of Psychiatry and Mental Health University of Cape Town Cape Town South Africa
4. Department of Psychiatry Massachusetts General Hospital/Harvard Medical School Boston MA USA
5. Department of Psychology University of Miami Miami FL USA