Institution: | (1) Department of Surgery Pizzamiglio II, , Niguarda Hospital, Pza Ospedale Maggiore, 20162 Milan, Italy;(2) Institute of Pathology, Niguarda Hospital, Milan, Italy;(3) Institute of Medicine (Clinica Medica III), University of Milan, Italy;(4) Departments of Surgery and Gastroenterology, University of Pittsburgh, Pittsburgh, Pennsylvania |