¹Central Hospital of Østfold, Medical, Sarpsborg, Norway, ²Nedre Glommen Legegruppe, Medical, Fredrikstad, Norway, ³Østfold University College, Fredrikstad, Norway

¹Tel Aviv Sourasky Medical Center, Inflammatory Bowel Diseases Center, Department of Gastroenterology and Liver Diseases, Tel Aviv, Israel, ²Tel Aviv Sourasky Medical Center, Research Center for Digestive Tract and Liver Diseases, Tel Aviv, Israel, ³Tel Aviv University, Sackler Faculty of Medicine, Tel Aviv, Israel, ⁴Current: Rabin Medical Center, Department of Gastroenterology, Petach Tikva, Israel

¹University of the Campania “Luigi Vanvitelli”, Department of Woman, Child and General and Specialized Surgery, Naples, Italy, ²University of Naples “Federico II”, Department of Translational Medical Science, Section of Pediatrics, Naples, Italy, ³University of Naples “Federico II”, Department of Radiology, Naples, Italy

¹Academic Medical Center, Gastroenterology and Hepatology, Amsterdam, The Netherlands, ²Buhlmann Laboratories, Schönenbuch, Switzerland

¹Hallym University College of Medicine, Dongtan Sacred Hospital, Department of Surgery, KyungKee, Seoul, South Korea, ²Cedars-Sinai Medical Center, Division of Colorectal Surgery, Los Angeles, USA

¹Saitama Medical Center, Saitama Medical University, Department of Gastroenterology and Hepatology, Kawagoe City, Saitama, Japan, ²Tokorozawa Proctology Hospital, Tokorozawa, City, Saitama, Japan, ³Ohmori Toshihide Gastrointestinal Clinic, Ageo City, Saitama, Japan

¹KU Leuven, Departement of Pharmaceutical and Pharmacological Sciences, Leuven, Belgium, ²University Hospitals Leuven, Department of Gastroenterology and Hepatology, Leuven, Belgium, ³KU Leuven, Department of Chronic Diseases, Metabolism and Ageing, Leuven, Belgium

¹University Hospital, Saint-Etienne, France, ²Academic Medical Centre, Amsterdam, The Netherlands, ³Galapagos SASU, Romanville, France, ⁴Gilead Sciences, Foster City, USA, ⁵Galapagos NV, Mechelen, Belgium, ⁶University Hospitals Leuven, Leuven, Belgium

¹Division of Internal Medicine, ''Villa Sofia-Cervello'' Hospital, Palermo, Italy, ²Inflammatory Bowel Disease Unit, A.O.U. Policlinico "G. Martino”, Messina, Italy, ³Gastroenterology Unit, A.O.U. Policlinico “Vittorio Emanuele”, Catania, Italy, ⁴Gastroenterology and Hepatology Unit, A.O.U. Policlinico “G. Giaccone”, Palermo, Italy, ⁵Gastroenterology Unit, A.R.N.A.S. “Garibaldi”, Catania, Italy, ⁶IBD Unit, A.O. "Cannizzaro”, Catania, Italy, ⁷Gastroenterology Unit, A.O. “Guzzardi”, Vittoria, Italy

Moscow Clinical Research Center, Department of Inflammatory Bowel Disease, Moscow, Russian Federation

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

¹Bristol Royal Infirmary, Department of Gastroenterology, Bristol, UK, ²Bristol Royal Infirmary, Bristol, UK, ³University of Bristol, School of Clinical Sciences, Bristol, UK, ⁴Bristol Royal Infirmary, Department of Hepatology, Bristol, UK

¹Academic Medical Center (AMC), Hospital Pharmacy, Amsterdam, The Netherlands, ²Academic Medical Center (AMC), Gastroenterology and Hepatology, Amsterdam, The Netherlands, ³Sanquin Research and Landsteiner Laboratory, Immunopathology, Amsterdam, The Netherlands, ⁴Sanquin Diagnostic Services, Biologicals Lab, Amsterdam, The Netherlands

¹Janssen Research and Development, LLC, Spring House, PA, USA, ²KU Leuven, Leuven, Belgium, ³Janssen-Cilag BV, Breda, The Netherlands, ⁴Janssen-Cilag, Issy-les-Moulineaux, France, ⁵Janssen Inc., Toronto, Canada, ⁶Janssen Research and Development, LLC, Raritan, NJ, USA

Affiliated Hospital of Nanjing University of Chinese Medicine, Colon and Rectal Surgery, NANJING, China

¹Katip Celebi University Ataturk Training and Research Hospital, General Surgery, Izmr, Turkey, ²Katip Celebi University Ataturk Training and Research Hospital, Gastroenterology, Izmr, Turkey

¹University of California, Davis, Davis, USA, ²Scripps Clinic, Division of Gastroenterology, La Jolla, USA, ³Massachusetts General Hospital, Division of Gastroenterology, Boston, USA, ⁴University of Pennsylvania, Center for Clinical Epidemiology and Biostatistics, Philadelphia, USA, ⁵The Scripps Research Institute, Scripps Translational Science Institute, La Jolla, USA

¹Tor Vergata University, Department of Surgery, Rome, Italy, ²Tor Vergata University, Surgery, Rome, Italy

¹University of Szeged, 1st Department of Medicine, Szeged, Hungary, ²University of Szeged, Institute of Laboratory Medicine, Szeged, Hungary, ³Physiological Controls Research Center, Óbuda University, Budapest, Hungary

Amgen Inc., Biosimilars, Thousand Oaks, USA