University of Cape Town (UCT) - Department of Pediatrics and Child Health, University of Cape Town (UCT), University of Cape Town (UCT) - Neuroscience Institute, University of Cape Town (UCT) - Department of Pediatrics and Child Health, University of Cape Town (UCT), University of Cape Town (UCT), affiliation not provided to SSRN, University of Cape Town (UCT), University of Cape Town (UCT) - Department of Pediatrics and Child Health, University of California - Departments of Neurology, Psychiatry and Biobehavioral Sciences, University of California, Los Angeles (UCLA), University of Cape Town (UCT) - Department of Pediatrics and Child Health, University of California, Los Angeles (UCLA) and University of Cape Town (UCT) - Neuroscience Institute