1. Hematology-Oncology Clinic, Tartu University, 50406 Tartu, Estonia
2. School of Life and Medical Sciences, University of Hertfordshire, Hatfield AL10 9AB, UK
3. U.O.C. Ematologia, Grande Ospedale Metropolitano Bianchi Melacrino Morelli, 89124 Reggio di Calabria, Italy
4. Department of Hematology, Erasmus University Medical Center, 3015 GD Rotterdam, The Netherlands
5. Myeloma Patients Europe, 1050 Brussels, Belgium
6. Jerome Lipper Multiple Myeloma Center, Dana Farber Cancer Institute, Boston, MA 02215, USA
7. Department of Internal Medicine I, University of Cologne, 50923 Cologne, Germany
8. Department of Hematology, Oncology and Bone Marrow Transplantation with Section of Pneumology, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
9. Quality of Life Unit, Saint Petersburg State University Hospital, 190103 Saint Petersburg, Russia