1. Department of Medicine, Division of Clinical Haematology, University of Cape Town and Groote Schuur Hospital, Cape Town, South Africa
2. Department of Radiation Oncology, University of Cape Town and Groote Schuur Hospital, Cape Town, South Africa
3. Department of Pathology, Division of Haematology, National Health Laboratory Service, University of Cape Town and Groote Schuur Hospital, Cape Town, South Africa
4. Department of Human Biology, Division of Biomedical Engineering, University of Cape Town, Cape Town, South Africa