[1] Osped Valduce, Gastroenterol Unit, Via Dante 10, I-22100 Como, Italy
[2] Fdn Policlin Univ A Gemelli IRCCS, Rome, Italy
[3] Poliambulanza Fdn, Digest Endoscopy Unit, Brescia, Italy
[4] San Giovanni AS Univ, Teaching Hosp, Div Gastroenterol U, Turin, Italy
[5] Univ Milan, Milan, Italy
[6] CTO Hosp, Digest Endoscopy Unit, Iglesias, Italy
[7] Hosp Busto Arsizio, Gastroenterol & Digest Endoscopy Unit, Busto Arsizio, Italy
[8] Nuovo Regina Margherita Hosp, Endoscopy Unit, Rome, Italy
[9] Curto Hosp, Div Gastroenterol, Polla, Italy
[10] Univ Cattolica Sacro Cuore, Digest Endoscopy Unit, Rome, Italy
[11] M Raimondi Hosp, Gastroenterol Div, San Cataldo, Italy
[12] ASST Santi Paolo & Carlo, Digest Physiopathol Unit, Milan, Italy
[13] Univ Milan, Fdn IRCCS Ca Granda Osped Maggiore Policlin, Dipartimento Sci Biomed Salute, Milan, Italy
[14] Ctr Riferimento Oncol Aviano CRO IRCCS, Div Ontol Gastroenterol, Aviano, Italy