1. Myeloma Unit, Division of Hematology, University of Torino, Azienda Ospedaliero-Universitaria Città della Salute e della Scienza di Torino, Torino, Italy;
2. Servicio de Hematología, Hospital Universitario de Salamanca, Centro de Investigación del Cáncer, Instituto de Biología Molecular y Celular del Cáncer, Universidad de Salamanca–Centro Superior de Investigaciones Científicas, Salamanca, Spain;
3. Department of Hematology, University Hospital, Lille, France;
4. Division of Hematology, College of Medicine, Mayo Clinic, Rochester, MN;
5. Clinica di Ematologia, Azienda Ospedaliero-Universitaria Ospedali Riuniti di Ancona, Ancona, Italy;
6. Department of Medicine, Roswell Park Cancer Institute, Buffalo, NY;
7. Unit of Clinical Epidemiology, Azienda Ospedaliero-Universitaria Città della Salute e della Scienza di Torino, Torino, Italy;
8. Department of Hematology and Medical Oncology, Emory University, Atlanta, GA;
9. Department of Hematology, VU University Medical Center, Amsterdam, The Netherlands;
10. Scientific Direction, Istituto di Ricovero e Cura a Carattere Scientifico, Referral Cancer Center of Basilicata, Rionero in Vulture, Italy;
11. Department of Clinical Therapeutics, School of Medicine, National and Kapodistrian University of Athens, Athens, Greece;
12. Department of Oncology, University of Alberta, Cross Cancer Institute, Edmonton, AB, Canada;
13. Department of Haematooncology and Faculty of Medicine, University of Ostrava, Ostrava, Czech Republic;
14. Department of Oncology, Hematology and Palliative Care, Wilhelminen, Vienna, Austria;
15. Division of Hematology-Oncology, Mayo Clinic, Scottsdale, AZ;
16. Department of Hematology, University Hospital Hôtel-Dieu, Nantes, France;
17. Department of Hematology/Oncology, Dana-Farber Cancer Institute, Boston, MA;
18. Medical Clinic and Polyclinic II, Department of Internal Medicine II, University Hospital, Wuerzburg, Germany;
19. Department of Hematology/Oncology, Cedars-Sinai Comprehensive Cancer Center, Los Angeles, CA;
20. Multiple Myeloma section, National Cancer Institute, Bethesda, MD;
21. Clínica Universidad de Navarra, Centro de Investigaciones Médicas Aplicadas, Pamplona, Spain;
22. Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA; and
23. Department of Hematology, Erasmus Medical Center and HOVON Data Center, Rotterdam, The Netherlands