[1] Stellenbosch Univ, Div Mol Biol & Human Genet, Cape Town, South Africa
[2] Stellenbosch Univ, South African Med Res Council, Ctr TB Res, Cape Town, South Africa
[3] Univ Pretoria, Dept Neurol, ZA-0028 Pretoria, South Africa
[4] Tygerberg Hosp, Med Genet, Cape Town, South Africa
[5] Univ Stellenbosch, Dept Med, Div Neurol, Cape Town, South Africa
[6] Stellenbosch Univ, Genom Brain Disorders Res Unit, South African Med Res Council, Cape Town, South Africa