1. Department of Oncology and Hematology, Asklepios Hospital Hamburg Altona, Hamburg, Germany
2. Department of Oncology and Hematology, Medizinische Klinik Heidelberg, Heidelberg, Germany
3. Division of Biostatistics, German Cancer Research Center, Heidelberg, Germany
4. Department of Hematology and Cell Therapy, University Hospital Leipzig, Leipzig, Germany
5. Department of Oncology and Hematology, Klinikum Chemnitz, Chemnitz, Germany
6. Department of Hematology/Oncology and Stem Cell Transplantation, AK St. Georg, Hamburg, Germany
7. Department of Oncology and Hematology, Charité Universitätsmedizin, Berlin, Germany
8. Department of Oncology and Hematology, University Hospital Cologne, Cologne, Germany
9. Laboratory of Hematology and Immunology & Labor für Myelomforschung, Vrije Universiteit Brussel (VUB), Jette, Belgium
10. Department of Oncology and Hematology, Coordination Centre for Clinical Trials (KKS), Heidelberg, Germany
11. Department of Oncology and Hematology, University Hospital Tubingen, Tubingen, Germany
12. Department of Oncology and Hematology, University Medical Center Mainz, Mainz, Germany
13. Department of Oncology and Hematology, University Hospital Bonn, Bonn, Germany
14. Department of Oncology and Hematology, Helios Hospital Berlin Buch, Buch, Germany
15. Department of Oncology and Hematology, Kath. Krankenhaus Hagen, Hagen, Germany
16. Department of Oncology and Hematology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
17. Department of Oncology and Hematology, University Hospital Essen, Essen, Germany
18. Zentrum für Infektiologie, Virologie Universitätsklinikum Heidelberg, Heidelberg, Germany
19. Department of Oncology and Hematology, National Center for Tumor Diseases (NCT), Heidelberg, Germany