1. Stellenbosch University; Centre for Evidence Based Health Care, Division of Epidemiology and Biostatistics, Department of Global Health, Faculty of Medicine and Health Sciences; Francie van Zyl Drive, Tygerberg, 7505, Parow Cape Town Western Cape South Africa 7505
2. South African Medical Research Council; Alcohol, Tobacco and Other Drug Research Unit; Tygerberg South Africa
3. University of Cape Town; Department of Psychiatry and Mental Health; Cape Town South Africa
4. Makerere University, College of Health Sciences; Department of Psychiatry; Kampala Uganda
5. College of Health Sciences, Makerere University; Africa Centre for Systematic Reviews & Knowledge Translation; Kampala Uganda