1. Digestive Endoscopy Unit, Fondazione Policlinico Universitario A. Gemelli IRCCS, Roma, Italia;
2. Centre for Endoscopic Research Therapeutics and Training – CERTT, Università Cattolica del Sacro Cuore, Roma, Italia;
3. Department of Bioimaging and Radiological Sciences, Fondazione Policlinico Universitario A. Gemelli IRCCS, Roma, Italia