University of Cape Town (UCT) - Department of Pediatrics and Child Health, London School of Hygiene & Tropical Medicine - Department of Clinical Research, London School of Hygiene & Tropical Medicine - MRC Tropical Epidemiology Group (TEG), University of Cape Town (UCT) - Department of Pediatrics and Child Health, University of Cape Town (UCT) - Department of Pediatrics and Child Health, University of Cape Town (UCT) - Department of Pediatrics and Child Health, University of Cape Town (UCT) - School of Public Health & Family Medicine, University College London, University of Cape Town (UCT) - Department of Pediatrics and Child Health, University of Cape Town (UCT) - SAMRC Unit on Risk & Resilience in Mental Disorders and University of Cape Town (UCT) - Department of Pediatrics and Child Health