Radboud University Nijmegen, Jeroen Bosch Hospital, Radboud University Nijmegen, Spaarne Gasthuis, Netherlands Cancer Institute Antoni van Leeuwenhoek, Maasstad Hospital, St. Antonius Hospital, Gelderse Vallei Hospital, Haga Hospital, Ziekenhuis Groep Twente, Radboud University Nijmegen - Radboud University Medical Center, Radboud University Nijmegen, Radboud University Nijmegen - Radboud University Medical Center, Amphia Hospital, Jeroen Bosch Hospital, Tergooi Medical Center, Medisch Spectrum Twente, Radboud University Nijmegen - Radboud University Medical Center, Netherlands Cancer Institute Antoni van Leeuwenhoek, Bravis Hospital, Diakonessen Hospital, Isala Zwolle, Erasmus University Rotterdam (EUR) - Department of Gastroenterology & Hepatology, Radboud University Nijmegen, Erasmus University Rotterdam (EUR) - Erasmus Medical Center (MC) and Independent

University of Amsterdam - Amsterdam University Medical Centers, University of Amsterdam - Amsterdam UMC, University of Amsterdam - Amsterdam Gastroenterology Endocrinology & Metabolism (AGEM), Unidade Local de Saúde de Entre Douro e Vouga (ULSEDV), University of Barcelona, Ruhr University of Bochum, Ghent University, University of Amsterdam - Department of Surgery, University of Pisa - Department of Translational Research on New Technologies in Medicine and Surgery, Maastricht University, Erasmus University Rotterdam (EUR) - Department of Gastroenterology & Hepatology, University of Amsterdam - Amsterdam UMC, Trinity College (Dublin), Beaujon Hospital, Università Vita-Salute San Raffaele - IRCCS Ospedale San Raffaele, Karolinska Institutet - Karolinska University Hospital, Ghent University, Erasmus University Rotterdam (EUR) - Erasmus Medical Center (MC), Liv Bona Dea Hospital, University of Hamburg - University Medical Center Hamburg-Eppendorf, University of Groningen, University of Helsinki, Beaujon Hospital, Leiden University, Humanitas University, Riga East University Hospital, Riga East University Hospital, University of Antwerp, University of Hamburg - University Medical Center Hamburg-Eppendorf, Università Vita-Salute San Raffaele - IRCCS Ospedale San Raffaele, University of Oslo - Oslo University Hospital, Ruhr University of Bochum, University of Hamburg - University Medical Center Hamburg-Eppendorf, University of Amsterdam - Amsterdam University Medical Centers, Erasmus University Rotterdam (EUR) - Department of Surgery, Leiden University, St. Antonius Hospital, St. Antonius Hospital, University of Amsterdam - Amsterdam University Medical Centers, University of Oslo - Oslo University Hospital, University of Amsterdam - Amsterdam University Medical Centers, Independent and Independent