Affiliation: | aCurrent affiliations: Gastroenterology and Gastrointestinal Endoscopy Division (P.A.T., A.M., S.C., E.M.) and Radiology Department (A.Z.), Vita-Salute San Raffaele University, Istitutio de Recerca e Cura a Carattere Scientifico, San Raffaele Hospital, Milan, Italy |