1. South African National Blood Service Roodepoort South Africa
2. University of California, San Francisco San Francisco California USA
3. Department of Hematology Sultan Qaboos University Hospital Muscat Oman
4. Department of Laboratory Medicine and Molecular Diagnostics Sunnybrook Health Sciences Centre Toronto Ontario Canada
5. Department of Laboratory Medicine and Pathobiology University of Toronto Toronto Ontario Canada
6. Division of Clinical Haematology, Department of Medicine, Faculty of Health Sciences University of Cape Town Cape Town South Africa