1. Alcohol, Tobacco and Other Drug Research Unit, South African Medical Research Council, Cape Town, South Africa
2. Alan J Flisher Centre for Public Mental Health, Department of Psychiatry and Mental Health, University of Cape Town, Rondebosch, South Africa
3. Department of Psychiatry and Mental Health, University of Cape Town, J-Block, Groote Schuur Hospital, Observatory, Cape Town, South Africa
4. Metro Health Services, Western Cape Government: Health, Bellville Health Park, Cape Town, South Africa
5. Division of Health Systems and Public Health, Department of Global Health, Faculty of Health Sciences, Stellenbosch University, Cape Town, South Africa
6. Curtin enAble Institute, Faculty of Health Sciences, Curtin University, Bentley, WA, Australia