1. Pharmacogenomics and Drug Metabolism Research Group, Division of Human Genetics, Department of Pathology, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa.
2. UCT/South African Medical Research Council (SAMRC) Platform for Pharmacogenomics Research and Translation, Cape Town, South Africa.
3. Division of Infectious Diseases, Department of Medicine, Groote Schuur Hospital, University of Cape Town, Cape Town, South Africa.
4. Division of Cardiology, Department of Medicine, Groote Schuur Hospital, University of Cape Town, Cape Town, South Africa.