1. Department of Psychiatry and Mental Health, University of Cape Town, Cape Town, South Africa.
2. MRC/UCT Human Genetics Research Unit, Division of Human Genetics, University of Cape Town, Cape Town, South Africa.
3. Medical Research Council (MRC) Unit on Anxiety and Stress Disorders, Cape Town, South Africa.
4. Department of Genetics, Stellenbosch University, Tygerberg, South Africa.
5. Department of Psychiatry, Stellenbosch University, Tygerberg, South Africa.
6. Department of Psychiatry, University of California San Diego, San Diego, California.
7. Veteran Affairs (VA) San Diego Center of Excellence for Stress and Mental Health, San Diego, California.