1. Division of Haematological Pathology, Faculty of Medicine and Health Sciences Stellenbosch University and National Health Laboratory Service, Tygerberg Hospital Cape Town South Africa
2. Department of Molecular Medicine and Haematology, Faculty of Health Sciences University of the Witwatersrand and National Health Laboratory Service Johannesburg South Africa
3. Division of Molecular Biology and Human Genetics, Faculty of Medicine and Health Science Stellenbosch University Stellenbosch South Africa
4. Division of Clinical Haematology, Department of Internal Medicine, Faculty of Medicine and Health Sciences Stellenbosch University and Tygerberg Hospital Cape Town South Africa