1. Department of Epidemiology and Gangarosa Department of Environmental Health, Rollins School of Public Health, Emory University, Atlanta, GA, USA
2. Department of Paediatrics and Child Health, Red Cross War Memorial Children’s Hospital, University of Cape Town, Cape Town, South Africa
3. Department of Clinical Research, London School of Hygiene & Tropical Medicine, London, UK
4. Neuroscience Institute, University of Cape Town, Cape Town, South Africa
5. Department of Psychiatry and Mental Health, University of Cape Town, Cape Town, South Africa
6. South African Medical Research Council (SAMRC) Unit on Child and Adolescent Health, University of Cape Town, Cape Town, South Africa
7. Department of Medical Genetics, University of British Columbia, Vancouver, Canada
8. BC Children’s Hospital Research Institute, Vancouver, Canada
9. Centre for Molecular Medicine and Therapeutics, Vancouver, Canada
10. Department of Biochemistry and Medical Genetics, University of Manitoba, and Children’s Hospital Research Institute of Manitoba, Winnipeg, Canada
11. South African Medical Research Council (SAMRC) Unit on Risk and Resilience in Mental Disorders, University of Cape Town, Cape Town, South Africa
12. Department of Human Genetics, School of Medicine, Emory University, Atlanta, GA, USA