1. St James's University Hospital, Leeds, United Kingdom
2. Leeds Cancer Research UK Clinical Trials Unit, Leeds Institute of Clinical Trials Research, Leeds, United Kingdom
3. Adult Leukaemia and Bone Marrow Transplant Unit, The Christie Hospital NHS Foundation Trust, University of Manchester, Manchester, United Kingdom
4. Western General Hospital, Edinburgh, United Kingdom
5. Kent and Canterbury Hospital, Canterbury, United Kingdom
6. Leicester Royal Infirmary, Leicester, United Kingdom
7. The Royal Bournemouth and Christchurch Hospitals NHS Foundation Trust, Bournemouth, United Kingdom
8. Royal Cornwall Hospital, Truro, United Kingdom
9. Department of Haematology, Aberdeen Royal Infirmary, Aberdeen, United Kingdom
10. Russells Hall Hospital, Dudley, United Kingdom
11. Worcestershire acute Hospital NHS Trust, Worchester, United Kingdom
12. Pilgrim Hospital Boston, Boston, United Kingdom
13. Sheffield Teaching Hospital NHS Foundation Trust, Sheffield, United Kingdom
14. Department of Haematology, University College London Hospitals NHS Foundation Trust, London, United Kingdom
15. Oxford University Hospital NHT Trust, Oxford, United Kingdom
16. Southampton General Hospital, Southampton, United Kingdom
17. Cardiff and Vale University Hospital, Cardiff, United Kingdom
18. University Hospitals Birmingham NHS Foundation Trust, Birmingham, United Kingdom
19. Nottingham University Hospitals NHS Trust, Nottingham, United Kingdom
20. Roche Products Limited, Welwyn Garden City, United Kingdom
21. Leeds Cancer Research UK Clinical Trials Unit, Leeds Institute of Clinical Trials Research, University of Leeds, Leeds, United Kingdom
22. King's College Hospital, London, United Kingdom
23. Castle Hill Hospital, Hull, United Kingdom
24. NCRI CLL Sub-group, Leeds, United Kingdom