Yonsei University College of Medicine, Department of Internal Medicine and Institute of Gastroenterology, Seoul, South Korea

¹St Mark’s Academic Institute, Robin Phillip’s Fistula Research Unit, London, UK, ²St Mark’s Hospital, Department of IBD, London, UK, ³St Mark’s Hospital, Department of Surgery, London, UK, ⁴St Mark’s Academic Institute, London, UK, ⁵LNWH ST MARKS HOSPITAL, Harrow, UK

Kliniken Essen Mitte, Gastroenterology, Essen, Germany

¹Austin Health, Department of Gastroenterology, Melbourne, Australia, ²University of Melbourne, Austin Academic Centre, Melbourne, Australia, ³St. Vincent's Hospital, Department of Gastroenterology, Melbourne, Australia, ⁴Austin Health, Gastroenterology, Melbourne, Australia, ⁵Australian Catholic University, Melbourne, Australia, ⁶Austin Health, Pathology, Melbourne, Australia, ⁷Eastern Health, Gastroenterology, Melbourne, Australia, ⁸Alfred Health, Gastroenterology, Melbourne, Australia, ⁹University of Melbourne, Medicine, Melbourne, Australia

¹Oregon Health and Science University, Portland, OR, USA, ²Cedars-Sinai Medical Center, Division of Gastroenterology, Department of Medicine, Los Angeles, CA, USA, ³University Hospitals Leuven, Department of Gastroenterology, Leuven, Belgium, ⁴University of North Carolina, Center for Gastrointestinal Biology and Disease, Chapel Hill, NC, USA, ⁵Pfizer Inc., Collegeville, PA, USA

¹University Hospital Zurich, Division of Gastroenterology and Hepatology, Zurich, Switzerland, ²University of Lausanne, IUMSP, Lausanne, Switzerland, ³Klinik Hirslanden, Department of Gastroenterology, Zurich, Switzerland, ⁴University of Bern, Institute of Social and Preventive Medicine, Bern, Switzerland, ⁵CHUV - Centre Hospitalier Universitaire Vaudois, Department of Gastroenterology, Lausanne, Switzerland, ⁶ Center of Gastroenterology and Hepatology, Zurich, Switzerland, ⁷University Hospital Zurich, Gastroenterology and Hepatology, Zurich, Switzerland

¹Division of Internal Medicine, “'Villa Sofia-Cervello” Hospital, Palermo, Italy, ²Gastroenterology Unit, A.O.O.R. “S. Elia- M. Raimondi”, Caltanissetta, Italy

¹Shaare Zedek Medical Center, Institute of Pediatric Gastroenterology, Jerusalem, Israel, ²The Broad Institute of MIT and Harvard, Cambridge, Center for Computational and Integrative Biology, Mass. General Hospital, Boston, USA, ³Soroka Medical Center, Beer Sheva, Israel, ⁴SickKids, Toronto, Canada, ⁵Sapienza University of Rome, Rome, Italy, ⁶CHOP, Philadelphia, USA, ⁷Children’s Hospital, Helsinki University, Helsinki, Finland, ⁸Schneider's Children Hospital, Petach Tiqva, Israel, ⁹Wolfson Medical Center, Holon, Israel

¹Hospital Clínic de Barcelona, IDIBAPS, CIBERehd, Barcelona, Spain, ²University of British Columbia, Division of Gastroenterology, Department of Medicine, Vancouver, BC, Canada, ³Icahn School of Medicine at Mount Sinai Hospital, Division of Gastroenterology, New York, NY, USA, ⁴Pfizer Inc., Collegeville, PA, USA

¹Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Internal Medicine, Seoul, South Korea, ²Hanyang University Guri Hospital, Guri, South Korea, ³Wonkwang University, Department of Internal Medicine, Jeonbuk, South Korea, ⁴Seoul National University College of Medicine, Department of Internal Medicine and Liver Research Institute, Seoul, South Korea, ⁵Haeundae Paik Hospital, Inje University College of Medicine, Department of Internal Medicine and Gastroenterology, Busan, South Korea

¹McGill University Health Centre, Division of Gastroenterology, Montréal, Canada, ²Princess Alexandra Hospital, Department of Gastroenterology and Hepatology, Brisbane, Australia, ³Geneva University Hospitals and University of Geneva, Department of Gastroenterology and Hepatology, Geneva, Switzerland, ⁴Semmelweis University, Department of Gastroenterology, Budapest, Hungary

¹Virgen Macarena Hospital, Gastroenterology, Sevilla, Spain, ²Juan Ramón Jiménez Hospital, Gastroenterology, Huelva, Spain, ³Virgen Macarena Hospital, Pharmacy Unit, Sevilla, Spain

¹St Vincent's Hospital, Gastroenterology, Melbourne, Australia, ²Mater Hospital, Gastroenterology, Brisbane, Australia, ³Mater Research Institute, Brisbane, Australia, ⁴Queen Elizabeth Hospital, Gastroenterology, Adelaide, Australia, ⁵University of Adelaide, Adelaide, Australia

¹Indiana University School of Medicine, Indianapolis, USA, ²Cincinnati Children's Hospital Medical Center, Cincinnati, USA, ³Massachusetts General Hospital for Children, Boston, USA, ⁴Phoenix Children's Hospital, Phoenix, USA, ⁵Penn State Children's Hospital, Hershey, USA, ⁶Abbvie Deutschland GmbH & Co. KG, Ludwigshafen, Germany, ⁷AbbVie, North Chicago, USA, ⁸University of Vermont Children’s Hospital, Burlington, USA, ⁹ImproveCareNow, Burlington, USA

¹CHU Saint Etienne, Saint Etienne, France, ²University of Lyon, Lyon, France, ³University Hospital, Gastroenterology, Saint Etienne, France, ⁴CHU de Nancy, Department of Gastroenterology, Vandoeuvre-les-Nancy, France, ⁵University of Saint Etienne, Immunology, Saint Etienne, France

Royal Bournemouth Hospital, Department of Gastroenterology, Bournemouth, UK

¹Hospital Universitario Miguel Servet, Zaragoza, Spain, ²Universidad de Zaragoza, Zaragoza, Spain, ³Fundación IIS Aragon, Zaragoza, Spain, ⁴Hospital Clinico Universitario Lozano Blesa, Gastroenterology Department, Zaragoza, Spain, ⁵Hospital Clinico Universitario Lozano Blesa, Pharmacy Department, Zaragoza, Spain, ⁶CIBERehd, Barcelona, Spain

¹Takeda Pharmaceuticals USA, Inc., Deerfield, USA, ²Icahn School of Medicine at Mount Sinai, New York, USA

¹University of Calgary, Gastroenterology, Calgary, Canada, ²University of Calgary, Community Health Sciences, Calgary, Canada, ³University of Calgary, Foothills Medical Centre, Diagnostic Imaging, Calgary, Canada

¹University Hospitals Leuven, Department of Gastroenterology and Hepatology, Leuven, Belgium, ²KU Leuven, Translational Research in Gastrointestinal Disorders, Department of Chronic Diseases, Metabolism and Ageing, Leuven, Belgium, ³KU Leuven, Laboratory for Therapeutic and Diagnostic Antibodies, Department of Pharmaceutical and Pharmacological Sciences, Leuven, Belgium