1. MRC Unit for Anxiety and Stress Disorders, University of Stellenbosch, South Africa; Desmond Tutu HIV Centre, University of Cape Town, Cape Town, South Africa
2. Desmond Tutu HIV Centre, University of Cape Town, Cape Town, South Africa
3. Desmond Tutu HIV Centre, University of Cape Town, Cape Town, South Africa; Infectious Diseases Epidemiology Unit, School of Public Health & Family Medicine, University of Cape Town, Cape Town, South Africa
4. MRC Unit for Anxiety and Stress Disorders, University of Stellenbosch, South Africa
5. MRC Unit for Anxiety and Stress Disorders, University of Stellenbosch, South Africa; Department of Psychiatry, University of Cape Town, Cape Town, South Africa