¹Shaare Zedek Medical Center, Jerusalem, Israel, ²Schneider Medical Center, Petach Tikva, Israel

¹University of Birmingham, Institute of Translational Medicine, Birmingham, UK, ²National Institute for Health Research (NIHR) Birmingham Biomedical Research Centre, Birmingham, UK, ³University of Birmingham, Institute of Immunology and Immunotherapy, Birmingham, UK, ⁴University Hospitals Birmingham NHS Foundation Trust, Department of Histopathology, Birmingham, UK, ⁵University of Calgary, IBD Unit, Calgary, Canada

¹Nordic Bioscience, Biomarkers and Research, Herlev, Denmark, ²Aarhus University Hospital, Hepatology and Gastroenterology, Aarhus, Denmark

¹University of Birmingham, Institute of Immunology and Immunotherapy, NIHR Biomedical Research Centre, Institute of Translational Medicine, Birmingham, UK, ²University Hospital CHU of Liège, Liège, Belgium, ³Mayo Clinic College of Medicine, Rochester, USA, ⁴Medical University of Vienna, Vienna, Austria, ⁵AbbVie Inc., North Chicago, USA, ⁶University of Barcelona, Hospital Clinic Barcelona, Barcelona, Spain

¹Hadassah-Hebrew University Medical Center, Department of Obstetrics and Gynecology, Jerusalem, Israel, ²Hadassah-Hebrew University Medical Center, Department of Medicine, Jerusalem, Israel, ³Shaare Zedek Medical Center affiliated with the Medical School of the Hebrew University, Department of Obstetrics and Gynecology, Jerusalem, Israel, ⁵Hadassah-Hebrew University Medical Center, Hematology Department, Jerusalem, Israel, ⁶Belinson Hospital, Rabin Medical Center, affiliated with Sackler School of Medicine, Tel Aviv University, Institute of Hematology, Petach Tiqua, Israel, ⁸Shaare Zedek Medical Center affiliated with the Medical School, Hebrew University, DIgestive Diseases Institute, IBD MOM Unit, Jerusalem, Israel, ¹⁰Shaare Zedek Medical Center, affiliated with the Faculty of Medicine, Hebrew University, Jerusalem, Israel, Digestive Diseases Institute, Jerusalem, Israel

¹Sheba Medical Center, Diagnostic imaging, Ramat Gan, Israel, ²Sheba Medical Center, Gastroenterology, Ramat Gan, Israel

¹CHU Liège, Liège, Belgium, ²CHR Lille, Lille, France, ³Hôpital Beaujon, Paris, France, ⁴CHU Montpellier, Montpellier, France, ⁵CHU Bordeaux, Bordeaux, France, ⁶CHU Nantes, Nantes, France, ⁷CHU Caen, Caen, France, ⁸CHU Nancy, Nancy, France, ⁹CHU Saint-Etienne, Saint-Etienne, France, ¹⁰CHU Marseille, Marseille, France, ¹¹CHU Rennes, Rennes, France, ¹²GHI Le Raincy-Montfermeil, Montfermeil, France, ¹³Centre Hospitalier de la côte basque, Bayonne, France, ¹⁴Hôpital Louis-Mourier, Université Paris Diderot, Colombes, France

¹Worcestershire Acute Hospitals NHS Trust, Department of Colorectal Surgery, Worcester, UK, ²Worcestershire Acute Hospitals NHS Trust, Department of Radiology, Worcester, UK

¹Cedars Sinai Medical Center, Colorectal Surgery, Los Angeles, USA

¹University of California, Los Angeles, Vatche and Tamar Manoukian Division of Digestive Diseases, Center for Inflammatory Bowel Diseases, Los Angeles, USA

¹UZ Leuven, Department of Gastroenterology and Hepatology, Leuven, Belgium, ²KU Leuven, Skeletal Biology and Engineering Research Center, Leuven, Belgium, ³UZ Leuven, Department of Dermatology, Leuven, Belgium, ⁴UZ Leuven, Department of Rheumatology, Leuven, Belgium, ⁵UZ Leuven, Department of Infectious Diseases, Leuven, Belgium

¹Vancouver Island IBD Clinic, Victoria, Canada, ²University of British Columbia, Faculty of Medicine, Vancouver, Canada

¹Marques De Valdecilla Universitary Hospital, Gastroenterology, Santander, Spain

¹Hospital Clinic, Gastroenterology Department, Barcelona, Spain, ²Inflammatory Bowel Disease Center, BIDMCand Harvard University, Boston, MA, USA

¹Academic Unit of Gastroenterology, Department of Infection, Immunity and Cardiovascular Disease, Sheffield, UK, ²Northern General Hospital, Sheffield, UK

¹Kyung Hee University School of Medicine, Department of Gastroenterology and Hepatology, Seoul, South Korea, ²Kyung Hee University School of Medicine, Department of Pathology, Seoul, South Korea, ³Yonsei University Wonju College of Medicine, Department of Internal Medicine, Wonju, South Korea

¹University of Birmingham, Institute of Immunology and Immunotherapy, NIHR Biomedical Research Centre, Institute of Translational Medicine, Birmingham, UK, ²Perelman School of Medicine, University of Pennsylvania, Philadelphia, USA, ³University of Maryland School of Medicine, Baltimore, USA, ⁴AbbVie Inc., North Chicago, USA, ⁵University of Calgary, Calgary, Canada

¹Department of Internal Medicine, Kosin University College of Medicine, Busan, South Korea

¹Campus Bio Medico University, Digestive Disease, Rome, Italy

¹St Mark's Hospital, London, UK, ²Imperial College London, London, UK, ³Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands, ⁴Centro Hospitalar S. Joao,, Porto, Portugal, ⁵King’s College, London, UK, ⁶South Devon NHS Foundation Trust,, Torbay, UK