[1] Univ Hosp Padua, Dept Surg Oncol & Gastroenterol, Padua, Italy
[2] Univ Padua, Dept Cardiothoracovasc Sci & Publ Hlth, Unit Biostat Epidemiol & Publ Hlth, Padua, Italy
[3] Santa Maria Prato Hosp, ULSS 1 Dolomiti, Gastroenterol & Digest Endoscopy Unit, Feltre, BL, Italy
[4] ULSS 9 Legnago, Gastroenterol & Endoscopy Unit, Verona, Italy
[5] San Bortolo Hosp, Gastroenterol & Endoscopy Unit, Vicenza, Italy