1. Health Economics Unit, School of Public Health and Family Medicine, University of Cape Town, Cape Town, South Africa
2. Curtin enAble Institute, Faculty of Health Sciences, Curtin University, Perth, Australia
3. Alcohol, Tobacco and Other Drug Research Unit, South African Medical Research Council, Cape Town, South Africa
4. Division of Addiction Psychiatry, Psychiatry and Mental Health, University of Cape Town, Cape Town, South Africa
5. Alan J Flisher Centre for Public Mental Health, Department of Psychiatry and Mental Health, University of Cape Town, Cape Town, South Africa
6. School of Health and Related Research, University of Sheffield, Sheffield, UK
7. Centre for Global Mental Health, Health Service and Population Research Department, Institute of Psychiatry, Psychology and Neuroscience, King’s College, London, UK