1. Department of Psychiatry and Mental Health, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
2. Mental Health, Alcohol, Substance Use and Tobacco Research Unit, South African Medical Research Council, Cape Town, South Africa
3. The Nelson Mandela School of Public Governance, University of Cape Town, Cape Town, South Africa
4. Institute for Social and Health Sciences, University of South Africa, Pretoria, South Africa
5. Department of Addictology, 1st Faculty of Medicine, Charles University and General University Hospital in Prague, Prague, Czech Republic
6. School of Public Health and Family Medicine, University of Cape Town, Cape Town, South Africa