1. Service d'Hématologie-Greffe de Moelle, Hôpital Saint Louis, Paris, France;
2. Clinical Trials Center Universitätsklinikum Freiburg, Freiburg, Germany;
3. Department of Hematology and Oncology, Universitätsklinikum Tübingen, Tübingen, Germany;
4. Klinik und Poliklinik für KMT, Universitätsklinikum Essen, Essen, Germany;
5. Department of Hematology and Oncology, Universitätsklinik Münster, Münster, Germany;
6. Department of Internal Medicine, Universitätsklinikum Hamburg-Eppendorf, Hamburg, Germany;
7. Department of Medicine, Helsinki University Central Hospital, Helsinki, Finland;
8. Department of Hematology, Universitätsspital Basel, Basel, Switzerland;
9. Centre of Blood and Bone Marrow Transplantation, Stiftung Deutsche Klinik für Diagnostik, Wiesbaden, Germany;
10. Department of Internal Medicine, Universitätsmedizin der Johannes-Gutenberg-Universität Mainz, Mainz, Germany;
11. Department of Internal Medicine, Hemato-oncology, University Hospital Brno, Brno, Czech Republic;
12. Department of Hematology, I.K. UZ Gasthuisberg, Leuven, Belgium;
13. Department of Hematology, Medizinisches Universitätsklinikum Graz, Graz, Austria;
14. Department of Hematology and Oncology, Klinikum der Universität Regensburg, Regensburg, Germany;
15. Department of Hematology and Oncology, Charles University Hospital, Plzen, Czech Republic;
16. Center for Bone Marrow Transplantation, Universitätsklinikum Carl Gustav Carus, Dresden, Germany;
17. Medizinische Klinik und Poliklinik II, Universitätsklinik Würzburg, Würzburg, Germany;
18. Department of Hematology, Klinikum Großhadern, München, Germany; and
19. Department of Hematology and Oncology, Universitätsklinikum Freiburg, Freiburg, Germany