1. Alan J. Flisher Centre for Public Mental Health, Department of Psychiatry & Mental Health, University of Cape Town, Cape Town, South Africa
2. Alcohol, Tobacco and Other Drug Research Unit, South African Medical Research Council, Tygerberg, South Africa
3. School of Public Health, University of the Witwatersrand, Witwatersrand, South Africa
4. Department of Psychiatry, Stellenbosch University, Tygerberg, South Africa
5. Institute for Mental Health Policy Research, Centre for Addiction and Mental Health, Toronto, Canada