1. Digestive Endoscopy Unit, Fondazione Policlinico Universitario Agostino Gemelli IRCSS, Largo A. Gemelli, 8, Rome, 00168, Italy
2. Università Cattolica del Sacro Cuore di Roma, Center for Endoscopic Research Therapeutics and Training (CERTT), Rome, Italy
3. Digestive Endoscopy Unit, Fondazione Policlinico Universitario Agostino Gemelli IRCSS, Rome, Italy