1. Hematology Unit; Fondazione IRCCS Ca' Granda-Ospedale Maggiore Policlinico; Milan Italy
2. Hematology Unit; Humanitas Cancer Center; Rozzano Italy
3. Department of Hematology; ASST Grande Ospedale Metropolitano Niguarda; Milan Italy
4. Hematology and Bone Marrow Transplantation Unit; San Raffaele Hospital Scientific Institute; Milan Italy
5. Epidemiology Unit; Fondazione IRCCS Ca' Granda-Ospedale Maggiore Policlinico; Milan Italy
6. University of Milan; Milan Italy