1. 1Department of Hematology, Transplantation Division, Hôpital Saint-Louis, Paris, France
2. 2Department of Biomedical Data Sciences, Leiden University Medical Center, Leiden, Netherlands;
3. 3Department of Malignant Hematology, H. Lee Moffitt Cancer Center, Tampa, FL;
4. 4European Bone Marrow Transplantation (EBMT) Statistical Unit, Leiden, Netherlands;
5. 5Department of Hematology and Immunology, Hôpital Saint-Louis, Assistance Publique Hôpitaux de Paris, Paris, France;
6. 6European Bone Marrow Transplantation (EBMT) Data Office Leiden, Leiden, Netherlands;
7. 7Cleveland Clinic, Avon Lake, OH;
8. 8Department of Bone Marrow Transplantation, University Hospital Essen, Essen, Germany;
9. 9Leukemia Service, Department of Medicine, Memorial Sloan-Kettering Cancer Center, New York, NY;
10. 10Division of Hematology, Medical Clinic and Policlinic I, University Hospital Dresden, Technical University (TU) Dresden, Dresden, Germany;
11. 11Department of Stem Cell Transplantation, University Medical Center Hamburg-Eppendorf, Hamburg, Germany;
12. 12Department of Internal Medicine V, University Clinic Heidelberg, Heidelberg, Germany;
13. 13Department of Medicine-Hematology, Oncology, Freiburg University Hospital and Medical Faculty, Freiburg, Germany;
14. 14King's College Hospital National Health Service (NHS) Foundation Trust, London, United Kingdom;
15. 15The Royal Bournemouth and Christchurch Hospitals National Health Service (NHS) Foundation Trust, Bournemouth, United Kingdom;
16. 16Programme de Transplantation & Therapie Cellulaire, Centre de Recherche en Cancérologie de Marseille, Institut Paoli Calmettes, Marseille, France;
17. 17INSERM U1287, Université Paris-Saclay, Gustave Roussy Cancer Center, Villejuif, France;
18. 18Western General Hospital, Edinburg, United Kingdom;
19. 19Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX;
20. 20Department of Hematology, U.O. Ematologia Centro Trapianti Midollo Osseo (CTMO) of Hematology, Parma, Italy;
21. 21Department of Hematology, Trinity College Dublin, St. James's Hospital, Dublin, Ireland;
22. 22Division of Hematology, Mayo Clinic, Rochester, MN;
23. 23Bone Marrow Transplantation (BMT) Center - Hematology Unit, Istituto di ricovero e cura a carattere scientifico (IRCCS) Ospedale Maggiore Policlinico Di Milano-University of Milan, Milano, Italy;
24. 24INSERM U1286, Centre Hospitalo-Universitaire (CHU) de Lille, Univ. Lille, Infinite, Lille, France; and
25. 25Génomes, biologie cellulaire et thérapeutique U944, Université Paris Cité, INSERM, Centre National de la Recherche Scientifique (CNRS), Paris, France
26. 26Service Hématologie Adultes, Hôpital Saint-Louis, Assistance Publique-Hôpitaux de Paris, Paris France