1. Myeloma Unit, Division of Hematology University of Torino, Azienda Ospedaliero Universitaria Città della Salute e della Scienza Torino Italy
2. Division of Stem Cell Transplantation and Immunotherapy University of Kiel Kiel Germany
3. Hematology Clinic AOU Ospedali Riuniti di Ancona Ancona Italy
4. Department for Hematology and Oncology University of Freiburg, Faculty of Freiburg Freiburg Germany
5. Hematology Department Fondazione IRCCS Istituto Nazionale dei Tumori Milano Italy
6. Hematology and Transplant Unit University of Udine Udine Italy
7. Ematologia e Centro Trapianti IRCCS Ospedale Policlinico San Martino Genova Italy
8. Department of Hematology University of Leipzig Leipzig Germany
9. UODS Ematologia AV3 Civitanova Marche Italy
10. Department of Hematology and Oncology Munich Clinic Schwabing Munich Germany
11. Department of Medicine II University Hospital of Würzburg Würzburg Germany
12. Department of Hematology Erasmus University Medical Center Cancer Institute Rotterdam The Netherlands