1. Department of Gastroenterology; Clinical Hospital Centre Rijeka; Rijeka Croatia
2. Department of Radiology; Clinical Hospital Centre Rijeka; Rijeka Croatia
3. Gastroenterology and Endoscopy Unit; Fondazione IRCCS Ca´ Granda - Ospedale Maggiore Policlinico, Milano; Milan Italy
4. Department of Pathophysiology and Transplantation; Università degli Studi di Milano; Milan Italy
5. Department of Clinical Sciences and Community Health - Laboratory of Medical Statistics, Biometry and Epidemiology "G.A. Maccacaro"; Università degli Studi di Milano; Milan Italy
6. Department of Transfusion Medicine and Haematology; Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico; Milan Italy