1 Digestive Endoscopy Unit, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Largo A. Gemelli, 8 00168, Rome, Italy. mariavaleria.matteo@unicatt.it.
2 Centre for Endoscopic Research Therapeutics and Training (CERTT), Università Cattolica del Sacro Cuore, 00168, Rome, Italy. mariavaleria.matteo@unicatt.it.
3 Digestive Endoscopy Unit, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Largo A. Gemelli, 8 00168, Rome, Italy.
4 Centre for Endoscopic Research Therapeutics and Training (CERTT), Università Cattolica del Sacro Cuore, 00168, Rome, Italy.
5 Hepatology and Infectious Diseases Department, National Institute for Infectious Diseases, Lazzaro Spallanzani-IRCCS, 00149, Rome, Italy.