1. Department of Behavioral and Social Sciences and Center for Alcohol and Addiction Studies, Brown University School of Public Health, Providence, Rhode Island.
2. Department of Psychiatry and Mental Health, University of Cape Town, Cape Town, South Africa.
3. Department of Social Policy and Intervention, University of Oxford, Oxford, United Kingdom.
4. Health Economics and HIV/AIDS Research Division, University of KwaZulu-Natal, South Africa.
5. Department of Psychology, University of Cape Town, Cape Town, South Africa.