[1] Univ Cape Town, Inst Infect Dis & Mol Med, Div Human Genet, ZA-7700 Rondebosch, South Africa
[2] Univ Cape Town, Biostat Unit, Med Res Council S Africa, ZA-7925 Cape Town, South Africa
[3] Univ Cape Town, Dept Psychiat, ZA-7925 Cape Town, South Africa
[4] Univ Cape Town, Dept Psychol, ZA-7925 Cape Town, South Africa
[5] Univ Cape Town, Dept Neurol, ZA-7925 Cape Town, South Africa