1. Department of Psychiatry, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA.
2. Department of Behavioral and Social Sciences, School of Public Health, Brown University, Providence, Rhode Island, USA.
3. Southern Africa Labour and Development Research Unit, University of Cape Town, Cape Town, South Africa.
4. Department of Pediatrics and Child Health, University of Cape Town, Cape Town, South Africa.
5. Department of Psychiatry and Mental Health, University of Cape Town, Cape Town, South Africa.
6. Faculty of Health Sciences, Peninsula Medical School, University of Plymouth, Plymouth, United Kingdom.
7. Department of Health Services, Policy and Practice, School of Public Health, Brown University, Providence, Rhode Island, USA.