1. Section of Experimental Haematology, St James's University Hospital; Leeds United Kingdom
2. Department of Hematology; Radboud University Medical Centre; Nijmegen The Netherlands
3. Department of Clinical Haematology and BMT Service; The Royal Melbourne Hospital; Melbourne Australia
4. Department of Haematology; St James' Institute of Oncology, Leeds Teaching Hospitals; Leeds United Kingdom
5. Institute of Transfusion Medicine, University of Ulm, Institute of Clinical Transfusion Medicine and Immunogenetics Ulm, German Red Cross Blood Transfusion Service Baden-Württemberg-Hessen, and University Hospital Ulm; Ulm Germany
6. King's College Hospital; Hill, Denmark, London United Kingdom
7. Dipartimento Di Medicina Clinica E Chirurgia Dell’ Università Degli Studi Di Napoli Federico II; Napoli Italy
8. Hematology Department; Cliniques Universitaires UCL Saint-Luc; Brussels Belgium
9. Hematology Department; University Hospital of Umea; Umea Sweden
10. New England Cancer Specialists; Scarborough Maine
11. Alexion Pharmaceuticals, Inc; Cheshire Connecticut
12. AP-HP Hematology Hospital Saint Louis; Paris France