1. Department of Paediatrics and Child Health Red Cross War Memorial Children's Hospital, University of Cape Town Cape Town South Africa
2. Department of Clinical Research London School of Hygiene & Tropical Medicine London UK
3. The Neuroscience Institute University of Cape Town Cape Town South Africa
4. Department of Psychiatry and Mental Health University of Cape Town Cape Town South Africa
5. SA MRC Unit on Risk and Resilience in Mental Disorders, Department of Psychiatry Stellenbosch University Stellenbosch South Africa
6. MRC International Statistics & Epidemiology Group London School of Hygiene & Tropical Medicine London UK
7. MRC Clinical Trials Unit University College London London UK
8. Departments of Neurology, Psychiatry and Biobehavioral Sciences University of California Los Angeles California USA
9. SA MRC Unit on Child & Adolescent Health University of Cape Town Cape Town South Africa
10. SA MRC Unit on Risk and Resilience in Mental Disorders University of Cape Town Cape Town South Africa