1. Faculty of Medicine and Health Sciences, Stellenbosch University, Cape Town, South Africa
2. Department of Medicine, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
3. Department of Psychiatry, Faculty of Medicine and Health Sciences, Stellenbosch University, Cape Town, South Africa
4. South African Medical Research Council Unit on the Genomics of Brain Disorders, Department of Psychiatry, Faculty of Medicine and Health Sciences, Stellenbosch University, Cape Town, South Africa
5. Department of Science and Innovation and National Research Foundation South African Research Chair in Posttraumatic Stress Disorder, Department of Psychiatry, Faculty of Medicine and Health Sciences, Stellenbosch University, Cape Town, South Africa