1. Italian Group for Adult Hematologic Diseases (GIMEMA), Data Center & Health Outcomes Research Unit, Rome, Italy
2. Department of Psychosocial Research, Division of Psychosocial Research & Epidemiology, The Netherlands Cancer Institute, The Netherlands
3. Quality of Life in Oncology French National Platform, Methodological & Quality of Life in Oncology Unit (INSERM UMR 1098), University Hospital of Besançon, Besançon, France