1. Department of Surgery, Grey's Hospital, Pietermaritzburg, South Africa.
2. Department of Surgery, College of Health Sciences, School of Clinical Medicine, University of KwaZulu-Natal, Durban, South Africa.
3. Department of Molecular Medicine and Haematology, School of Pathology, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg and the National Health Laboratory Service, Johannesburg, South Africa.
4. National Cancer Registry, National Health Laboratory Service, Johannesburg, South Africa.
5. Sydney Brenner Institute for Molecular Bioscience, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa.
6. Department of Anatomical Pathology, School of Pathology, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg and the National Health Laboratory Service, Johannesburg, South Africa.
7. Lancet Laboratories, Johannesburg, South Africa.
8. Division of Medical Biochemistry and Institute of Infectious Disease and Molecular Medicine, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa.
9. Division of Human Genetics, National Health Laboratory Service, and School of Pathology, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa.