Mauriziano Hospital, Gastroenterology Unit, Torino, Italy

¹Nabeul-Tunisia, Department of Gastroenterology Nabeul-Tunisia, Nabeul, Tunisia, ²Nabeul-Tunisia, Nabeul-Tunisia, Nabeul, Tunisia, ³Mohamed Taher Maamouri Hospital, Department of Gastroenterology, Nabeul, Tunisia

¹New York Presbyterian Hospital, New York, USA, ²Aix-Marseille University, Marseille, France

¹The Alfred Centre, Department of Gastroenterology, Monash University, Melbourne, Australia, ²The Royal Melbourne Hospital, Department of Gastroenterology, Melbourne, Australia, ³Swinburne University, Psychological Sciences and Statistics, Hawthorn, Australia, ⁴AbbVie Pty Ltd., Immunology (Medical), Sydney, Australia

University College London Hospital, Department of Gastroenterology, London, UK

¹University Hospital Center Jean Minjoz, Gastroenterology, Besancon, France, ²Private Clinic Pasteur, Gastroenterology, Toulouse, France, ³University Hospital Center, Gastroenterology, Nantes, France, ⁴University Hospital Center, Gastroenterology, Lille, France, ⁵University Hospital Center, Gastroenterology, Caen, France, ⁶Private Practise, Gastroenterology, Montpellier, France, ⁷Private Clinic La Louviere, Gastroenterology, Lille, France, ⁸University Hospital Center, Gastroenterology, Rouen, France, ⁹Aphm North Hospital, Gastroenterology, Marseille, France, ¹⁰Private Practice, Gastroenterology, Toulon, France, ¹¹University Hospital Center Rangueil, Gastroenterology, Toulouse, France, ¹²Hospital Louis Pasteur, Gastroenterology, Colmar, France, ¹³Hospital Saint Louis APHP, Gastroenterology, Paris, France, ¹⁴Hospital Saint Antoine APHP, Gastroenterology, Paris, France, ¹⁵University Hospital Center Caremeau, Gastroenterology, Nimes, France, ¹⁶University Hospital Center, Gastroenterology, Saint Etienne, France, ¹⁷University Hospital Center Cochin APHP, Gastroenterology, Paris, France, ¹⁸University Hospital Center Brabois, Gastroenterology, Nancy, France, ¹⁹University Hospital Center Le Bocage, Gastroenterology, Dijon, France, ²⁰Hospital Haut Anjou, Gastroenterology, Chateau Gontier, France, ²¹Private Clinic Des cèdres, Gastroenterology, Cornebarrieu, France, ²²Private Practice, Gastroenterology, Belfort, France, ²³Private Hospital, Gastroenterology, Saint Priest en Jarez, France, ²⁴European Hospital Georges Pompidou APHP, Gastroenterology, Paris, France, ²⁵Hospital HNFC, Gastroenterology, Trevenans, France, ²⁶University Hospital Center Larchet, Gastroenterology, Nice, France, ²⁷University Hospital Henri Mondor APHP, Gastroenterology, Créteil, France, ²⁸Private Practice, Gastroenterology, Paris, France, ²⁹University Hospital Center Hôtel Dieu, Gastroenterology, Nantes, France, ³⁰Institut Mutualiste Montsouris, Gastroenterology, Paris, France

¹Hospital Clínic de Barcelona, IDIBAPS, CIBERehd, Gastroenterology Department, Barcelona, Spain, ²Faculty of Medicine, Autonomous University of Madrid, Department of Surgery, Madrid, Spain, ³Takeda Pharmaceuticals International Co., Cambridge, USA, ⁴Takeda Pharmaceuticals International AG, Zurich, Switzerland, ⁵Takeda Development Centre, London, UK

¹Örebro University, Department of Gastroenterology, Faculty of Medicine and Health, Örebro, Sweden, ²Hospital of Trelleborg, Department of Medicine, Division of Gastroenterology, Trelleborg, Sweden, ³Danderyd Hospital, Department of Internal Medicine, Stockholm, Sweden, ⁴Linköping University, Department of Gastroenterology and Department of Clinical and Experimental Medicine, Linköping, Sweden, ⁵Örebro University, Department of Clinical Epidemiology and Biostatistics, Faculty of Medicine and Health, Örebro, Sweden, ⁶Karolinska Institute, Department of Medicine, Gastrocentrum, Stockholm, Sweden, ⁷Merck Sharp and Dohme, Sweden, Stockholm, Sweden, ⁸Skåne University Hospital, Department of Gastroenterology, Lund, Sweden, ⁹Södra Älvsborgs Hospital, Department of Internal Medicine, Borås, Sweden

¹Lausanne University, Lausanne, Switzerland, ²CHUV – Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland, ³Crohn's and Colitis Center, Lausanne, Switzerland

¹St James's Hospital, Department of Gastroenterology, Dublin, Ireland, ²INITIative, Investigator Network for Inflammatory Bowel Disease Therapy in Ireland, Dublin, Ireland, ³Galway University Hospital, Department of Gastroenterology, Galway, Ireland, ⁴St Vincent's University Hospital, Department of Gastroenterology and Centre for Colorectal Disease, Dublin, Ireland, ⁵Connolly Hospital Blanchardstown, Department of Gastroenterology, Dublin, Ireland, ⁶Our Lady of Lourdes Hospital, Department of Gastroenterology, Drogheda, Ireland, ⁷Beaumont Hospital, Department of Gastroenterology, Dublin, Ireland, ⁸Tallaght hospital, Department of Gastroenterology, Dublin, Ireland, ⁹Beacon Hospital, Department of Gastroenterology, Dublin, Ireland

¹Hospital Universitario La Paz, Department of Gastroenterology, Madrid, Spain, ²Hospital Universitario la paz, Radiology, Madrid, Spain, ³Hospital Universitario la paz, Gastroenterology, Madrid, Spain

¹University of Florence, Florence, Italy, ²Division of Gastroenterology, AOU Careggi Hospital, Department of Emergency, Florence, Italy, ³Digestive Surgery Unit, Careggi University Hospital, Department of Surgery and Translational Medicine, Florence, Italy

¹University of Turin, Medical School, Department of Public Health and Pediatric Sciences, Viral Pathogenesis Unit, Turin, Italy, ²University of Piemonte Orientale, Department of Translational Medicine, Virology Unit, Novara, Italy, ³University Hospitals Leuven, Department of Gastroenterology and Hepatology, Leuven, Belgium, ⁴Translational Research in Gastrointestinal Disorders, Department of Chronic Diseases, Metabolism and Ageing, Leuven, Belgium

¹University of Calgary, Calgary, Canada, ²Friedrich-Alexander-University Erlangen-Nürnberg, Medical Clinic 1, Erlangen, Germany, ³University Hospitals Leuven, Leuven, Belgium, ⁴Icahn School of Medicine at Mount Sinai, New York, USA, ⁵University of Miami, Miami, USA, ⁶AbbVie Inc., North Chicago, USA

¹MassGeneral Hospital for Children, Pediatric Gastroenterology, Boston, USA, ²Harvard Medical School, Boston, USA, ³Cincinnati Children's Hospital, Cincinnati, USA, ⁴Children’s Mercy Hospital, Kansas City, USA, ⁵University of Texas-Southwestern/Children's Medical Center, Dallas, USA, ⁶The Children’s Hospital at Montefiore, Bronx, USA, ⁷Mayo Clinic-Children’s Center, Rochester, USA, ⁸Takeda Pharmaceuticals USA, Deerfield, USA, ⁹University of Vermont College of Medicine, Burlington, USA

¹University Medical Centre Ljubljana, Department of Gastroenterology, Ljubljana, Slovenia, ²KU Leuven, Laboratory of Pharmaceutical Biology, Leuven, Belgium

¹Gastroneterology Unit, Saint Etienne, France, ²University of Saint Etienne, Immunology, Saint Etienne, France, ³University of Lyon, Lyon, France, ⁴University Hospital, Gastroenterology, Saint Etienne, France, ⁵Saint Etienne University, Saint Etienne, France, ⁶CHU Saint Etienne, Saint Etienne, France

¹Università della Campania, Unit of Colorectal Surgery, Naples, Italy, ²St Mark's Hospital, Fistula Research Unit, London, UK, ³Imperial College, Department of Surgery and Cancer, London, UK, ⁴Oxford University Hospital NHS Trust - Churchill Hospital, Department of Colorectal Surgery, Oxford, UK, ⁵Faculty of Medicine, University of Kelaniya, Department of Surgery, Kelaniya, Sri Lanka, ⁶Humanitas University, Colon and Rectal Surgery Unit, Department of General Surgery, Rozzano, Italy, ⁷Humanitas University, Humanitas University, Department of Biomedical Sciences, Rozzano, Italy

¹PHMR Ltd., London, UK, ²Takeda Pharmaceuticals International GmbH, Zurich, Switzerland, ³Takeda UK Ltd., High Wycombe, UK

¹Friedrich-Alexander University Erlangen-Nürnberg, Department of Medicine 1, Erlangen, Germany, ²Friedrich-Alexander University Erlangen-Nürnberg, Department of Medicine 3, Erlangen, Germany, ³Progentica Biopharma, Derio, Spain, ⁴Friedrich-Alexander University Erlangen-Nürnberg, Department of Medical Informatics, Biometry and Epidemiology, Erlangen, Germany