Affiliation: | a Digestive Endoscopy Unit, Catholic University, Rome, Italy b Gastroenterology Department, University of Navarra Clinic, Pamplona, Spain c Department of Internal Medicine, Evangelisches Krankenhaus, Düsseldorf, Germany d Department of Gastroenterology, Hopital Erasme, Université Libre de Bruxelles, Brussels, Belgium e Department of Gastroenterology and Hepatology, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands f Department of Gastroenterology and Hepatology, University Hospital, Nantes, France g Department of Internal Medicine and Digestive Pathology, Hopitaux de Brabois, University Hospital of Nancy, Vandoeuvre les Nancy, France h Endoscopy Unit, Skåne University Hospital, Malmö, Sweden |