1 Digestive Endoscopy Unit, Fondazione Policlinico Universitario A. Gemelli, Rome, Italy.
2 IRCCS, Fondazione Policlinico Universitario A. Gemelli, CERTT, Center for Endoscopic Research Therapeutics and Training, Catholic University, Rome, Italy; Departments of Gastroenterology and Internal Medicine, Colentina Clinical Hospital, Carol Davila University of Medicine, Bucharest, Romania.
3 Pancreas Institute, Gastroenterology and Digestive Endoscopy Unit, University Hospital Azienda Ospedaliera Universitaria Integrata, Verona, Italy.