1. Department of Haematology, Cardiff University School of Medicine, Cardiff, United Kingdom;
2. Department of Haematology, Nottingham University Hospital NHS Trust, Nottingham, United Kingdom;
3. Department of Haematology, University Hospital of Wales Cardiff, United Kingdom;
4. Department of Haematology, St Bartholomew's Hospital, West Smithfield, London United Kingdom;
5. Department of Haematology, Rigshospitalet, Copenhagen, Denmark;
6. Department of Haematology, Belfast City Hospital, Belfast, United Kingdom;
7. Blackpool Victoria Hospital, Blackpool, United Kingdom;
8. Department of Haematology, Christie Hospital, Manchester, United Kingdom;
9. Department of Haematology, University of Odense, Odense, Denmark;
10. Department of Haematology, Heartlands Hospital, Birmingham, United Kingdom; and
11. Department of Haematology, Royal Liverpool University Hospital, Liverpool, United Kingdom