Polytechnic University of Valencia, Polytechnic University of Valencia, Humanitas University, University of Brescia, Polytechnic University of Valencia, Polytechnic University of Valencia, University of Cologne, University of Milan, KU Leuven - Department of Gastroenterology and Hepatology, UZ Leuven, University of Calgary, affiliation not provided to SSRN, University of Washington, affiliation not provided to SSRN, Johns Hopkins University, University of Calgary - Division of Gastroenterology & Hepatology, University of Nottingham, Queen Alexandra Hospital, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, Klinikum Bayreuth, affiliation not provided to SSRN, London South Bank University, University of Cologne, Humanitas University and Polytechnic University of Valencia