[1] Univ Stellenbosch, Fac Hlth Sci, Dept Psychiat, ZA-7505 Tygerberg, South Africa
[2] Univ Stellenbosch, Fac Hlth Sci, Dept Psychiat, South African Res Chairs Program, ZA-7505 Tygerberg, South Africa
[3] Univ Stellenbosch, Fac Hlth Sci, Dept Psychiat, MRC Stress & Anxiety Disorders Unit, ZA-7505 Tygerberg, South Africa