1. Division of Anatomical Pathology Faculty of Health Sciences National Health Laboratory ServiceChris Hani Baragwanath Academic HospitalUniversity of the Witwatersrand Soweto GautengSouth Africa
2. Department of Haematology and Molecular Medicine Somatic Cell Genetics Unit Faculty of Health Sciences National Health Laboratory ServiceUniversity of the Witwatersrand Soweto GautengSouth Africa
3. Department of Medicine Clinical Haematology unit Faculty of Health Sciences Chris Hani Baragwanath Academic HospitalUniversity of the Witwatersrand Soweto GautengSouth Africa
4. Faculty of Health Sciences Division of Anatomical Pathology National Health Laboratory ServiceUniversity of the Witwatersrand Soweto Gauteng South Africa