1. Digestive Endoscopy Unit Fondazione Policlinico Universitario A. Gemelli IRCCS Rome Italy
2. Gastroenterology Department Colentina Clinical Hospital Carol Davila University of Medicine Bucharest Romania
3. Digestive Endoscopy Unit Fondazione Policlinico Universitario A. Gemelli, IRCCS Catholic University Rome Italy
4. IHU‐USIAS University of Strasbourg Strasbourg France