Department of Gastroenterology, Icahn School of Medicine at Mount Sinai, New York, NY, USA. Electronic address: jean-frederic.colombel@mssm.edu. Inflammatory Bowel Disease Unit, Department of Medicine, University of Calgary, Calgary, AB, Canada. Imelda General Hospital, Bonheiden, Belgium. Clinical and Research Centre for Inflammatory Bowel Disease, ISCARE Clinical Centre, Prague, Czech Republic; First Medical Faculty, Charles University, Prague, Czech Republic. AZ Delta, Roeselare-Menen, Belgium. Hepato-Gastroenterologie HK, sro, Hradec Králové, Czech Republic. Department of Gastroenterology, Bezmialem Vakif University, Istanbul, Turkey. Department of Internal Medicine III, Medical University of Vienna, Vienna, Austria. Presidio Columbus, Fondazione Policlinico Gemelli Università Cattolica, Rome, Italy. Service de Gastro-entérologie et Nutrition Clinique, Nice, France; Université de Nice-Sophia-Antipolis, Nice, France. Oxford University Hospitals, Oxford, UK. Department of Biomedical Sciences, Humanitas University, Milan, Italy; Humanitas Clinical and Research Centre, Milan, Italy. Division of Gastroenterology, Department of Medicine, University of California San Diego, La Jolla, CA, USA. Department of Gastroenterology, University of Leuven, Leuven, Belgium. Department of Medicine, University of California, Los Angeles, CA, USA. Department of Medicine I, University Hospital Schleswig-Holstein, Kiel, Germany. AbbVie Inc, North Chicago, IL, USA. AbbVie Spain SLU, Madrid, Spain. Academic Medical Center, Amsterdam, Netherlands.