1. Department of Haematology, University of Cambridge, Cambridge, United Kingdom;
2. Department of Haematology, Addenbrooke's Hospital, Cambridge, United Kingdom;
3. Wellcome Trust Sanger Institute, Duxford, United Kingdom;
4. Department of Haematology, Russell's Hall Hospital, Dudley, United Kingdom;
5. Department of Pathology, Royal Victoria Infirmary, Newcastle, United Kingdom;
6. Department of Haematology, Royal Hallamshire Hospital, Sheffield, United Kingdom;
7. Department of Haematology and Pathology, Odense University Hospital, Odense, Denmark;
8. Medical Research Council (MRC) Dunn Nutrition Unit, University of Cambridge, Cambridge, United Kingdom;
9. Birmingham Clinical Trials Unit, Birmingham, United Kingdom;
10. Clinical Trials Service Unit, Oxford, United Kingdom; and
11. Department of Haematology, St Thomas's Hospital, London, United Kingdom