Università Vita-Salute San Raffaele - San Raffaele Hospital, Western University, Icahn School of Medicine at Mount Sinai, University of Chicago, University of Lorraine, University of Lorraine, University of Calgary, University of Calgary - Division of Gastroenterology & Hepatology, Imelda General Hospital, Mayo Clinic, Goethe University, Tel Aviv University - Rabin Medical Center, Mayo Clinic - College of Medicine, University of Picardie Jules Verne, Università Vita-Salute San Raffaele - San Raffaele Hospital, Örebro University, St Marks Hospital and Academic Institute - Department of Gastroenterology, Kitasato University - Center for Advanced IBD Research and Treatment, University of Chicago, affiliation not provided to SSRN, Sapienza University of Rome, Semmelweis University, Concord Repatriation General Hospital - Gastroenterology and Liver Services, Mayo Clinic - Division of Gastroenterology and Hepatology, Centre Hospitalier Universitaire de Liege, Universidade do Porto, Centro de Educación Médica e Investigaciones Clínicas (CEMIC) - Department of Medicine, Government of the United Kingdom - Department of Gastroenterology, Charité - Universitätsmedizin Berlin, University Hospital Zurich, University of Calgary, University of Amsterdam - Department of Radiology and Nuclear Medicine, Universidad de Barcelona - Hospital Clínic Barcelona, University of Lorraine - Department of Hepatogastroenterology and Università Vita-Salute San Raffaele - IRCCS Ospedale San Raffaele