1. Department of Clinical Haematology Oxford University Hospitals Oxford UK
2. NHS Blood and Transplant Bristol UK
3. Department of Clinical Haematology University Hospitals Birmingham Birmingham UK
4. Department of Haematology Guy's and St Thomas' NHS Foundation Trust London UK
5. Department of Haematology Kings College Hospital London UK
6. Canadian Blood Services Ottawa Canada
7. Department of Laboratory Medicine & Pathobiology Sunnybrook Health Sciences Centre Toronto Canada
8. Radcliffe Department of Medicine University of Oxford Oxford UK