Inflamm Bowel Dis 2014 Sep;20(9):1555-61
*Gastroenterology Unit, Department of Systems Medicine, University of Rome "Tor Vergata", Roma, Italy; †Department of Medicine, DIMED, Pathology Unit, University of Padova, Padova, Italy; and ‡Pathology Unit, Department of Surgery, and §Surgical Unit, Department of Surgery, University of Rome "Tor Vergata", Roma, Italy.