1 Oncohematology Division and Oncohematology Unit of the Elderly IRCCS Ca' Granda Foundation - Policlinico Maggiore Hospital University of Milan Milan, Italy aiurlo@policlinico.mi.it Oncohematology Division IRCCS Ca' Granda Foundation - Policlinico Maggiore Hospital University of Milan Milan, Italy Gastroenterology and Endoscopy Unit IRCCS Ca' Granda Foundation - Policlinico Maggiore Hospital University of Milan Milan, Italy Hematopathology Service Division of Pathology Department of Pathophysiology and Transplantation University of Milan and IRCCS Ca' Granda Foundation - Policlinico Maggiore Hospital Milan, Italy Gastroenterology and Endoscopy Unit IRCCS Ca' Granda Foundation - Policlinico Maggiore Hospital University of Milan Milan, Italy Oncohematology Division IRCCS Ca' Granda Foundation - Policlinico Maggiore Hospital University of Milan Milan, Italy.