1 Division of Molecular Biology and Human Genetics, Department of Biomedical Sciences, Faculty of Medicine and Health Sciences, Stellenbosch University, South Africa; and South African Medical Research Council/Stellenbosch University Genomics of Brain Disorders Research Unit, Stellenbosch University, Cape Town, South Africa. sbardien@sun.ac.za.
2 Division of Molecular Biology and Human Genetics, Department of Biomedical Sciences, Faculty of Medicine and Health Sciences, Stellenbosch University, Cape Town, South Africa. abraun@sun.ac.za.
3 Department of Neurology, School of Medicine, Faculty of Health Sciences, University of Pretoria, South Africa; and Pretoria Institute of Neurology, Die Wilgers, Pretoria, South Africa. riaan.vancoller@up.ac.za.
4 Department of Neurology, Inkosi Albert Luthuli Central Hospital, Cato Manor, Durban, South Africa; and Department of Neurology, Faculty of Medicine and Health Sciences, University of KwaZulu-Natal, Durban, South Africa. FerzanaAmo@ialch.co.za.
5 Division of Neurology, Department of Medicine, Faculty of Medicine and Health Sciences, Stellenbosch University, Cape Town, South Africa. jcarr@sun.ac.za.
6 Division of Molecular Biology and Human Genetics, Department of Biomedical Sciences, Faculty of Medicine and Health Sciences, Stellenbosch University, Cape Town, South Africa; and Medical Genetics, Tygerberg Hospital, Cape Town, South Africa. shahidamoosa@sun.ac.za.