Affiliation: | Department of Gastrointestinal Endoscopy, San Paolo Universitary Hospital Milan,;Garbagnate Hospital, Milan,;Magenta Hospital, Milan,;S. Giuseppe Hospital, Milan,;Ospedale Maggiore di Crema, Crema,;Istituti Ospitalieri di Cremona, Cremona,;Rho Hospital, Milan,;San Carlo Borromeo Hospital, Milan,;Gastroenterology and Endoscopic Unit, S. Raffaele Hospital, Milan,;Presidio ospedaliero cremonese, Cremona,;Valduce Hospital, Como,;Seriate Hospital, Bergamo,;Zingonia Hospital, Bergamo,;S. Gerardo Hospital, Monza, and;San Matteo Hospital, Pavia, Italy |