¹University of Szeged, 1st Department of Internal Medicine, Szeged, Hungary, ²University of Szeged, Department of Pediatrics, Szeged, Hungary

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

Theradiag, R&D, Croissy Beaubourg, France

¹Hospital Universitari Germans Trias i Pujol, Gastroenterology, Badalona - Barcelona, Spain, ²Hospital Universitari Germans Trias i Pujol, Department of Gastroenterology, Badalona - Barcelona, Spain, ³CIBEREHD, Madrid, Spain, ⁴CHU Santiago, Santiago de Compostela, Spain, ⁵Hospital Reina Sofía, Cordoba, Spain, ⁶Hospital Universitario Ramón y Cajal, Gastroenterology, Madrid, Spain, ⁷Hospital Universitari Clínic, Gastroenterology, Barcelona, Spain, ⁸Hospital Parc Taulí, Gastroenterology, Sabadell, Spain, ⁹Hospital de Sant Joan Despí Moisès Broggi, Gastroenterology, Sant Joan Despí, Spain, ¹⁰Hospital de Galdakao, Gastroenterology, Galdakao, Spain, ¹¹Hospital Clínico San Carlos, Gastroenterology, Madrid, Spain, ¹²Hospital Clínico Universitario de Valencia, Gastroenterology, Valencia, Spain, ¹³Hospital Universitario Fundación Alcorcón, Gastroenterology, Alcorcón, Spain, ¹⁴Hospital Universitario de Canarias, Gastroenterology, La Laguna, Spain, ¹⁵Hospital Universitario de Torrejón, Gastroenterology, Torrejón de Ardoz, Spain, ¹⁶Hospital Universitario de Fuenlabrada, Gastroenterology, Fuenlabrada, Spain, ¹⁷Hospital Universitario de La Princesa, Gastroenterology, Madrid, Spain, ¹⁸Hospital Universitario Basurto, Gastroenterology, Bilbao, Spain, ¹⁹Hospital Universitario Infanta Sofía, Gastroenterology, San Sebastián de los Reyes, Spain, ²⁰Hospital de Mataró, Gastroenterology, Mataró, Spain, ²¹Hospital Universitario Marqués de Valdecilla, Gastroenterology, Santander, Spain, ²²Hospital General de Granollers, Gastroenterology, Granollers, Spain, ²³Hospital Universitario Nuestra Señora de Candelaria, Gastroenterology, Santa Cruz de Tenerife, Spain, ²⁴Hospital Universitari de Bellvitge; IDIBELL, Gastroenterology, L'Hospitalet del Llobregat, Spain, ²⁵Hospital Universitario de Salamanca, Gastroenterology, Salamanca, Spain, ²⁶Consorci Sanitari de Terrassa, Gastroenterology, Terrassa, Spain, ²⁷Hospital Arnau de Vilanova, Gastroenterology, Lleida, Spain, ²⁸Hospital Universitario Mútua Terrassa, Gastroenterology, Terrassa, Spain, ²⁹Hospital Universitario Araba, Gastroenterology, Vitoria, Spain

¹University Medical Centre Ljubljana, Department of Gastroenterology and Hepatology, Ljubljana, Slovenia, ²Department of Pharmaceutical and Pharmacological Sciences, Laboratory for Therapeutic and Diagnostic Antibodies, Leuven, Belgium, ³University Hospitals Leuven, Department of Gastroenterology and Hepatology, Leuven, Belgium

¹Medical University of Vienna, Division of Gastroenterology and Hepatology, Vienna, Austria, ²University Hospitals Leuven, Department of Pathology, Leuven, Belgium, ³Academic Medical Centre, Inflammatory Bowel Disease Centre, Amsterdam, The Netherlands, ⁴Gilead Sciences, Inc., Foster City, USA, ⁵Galapagos NV, Mechelen, Belgium, ⁶University Hospitals Leuven, Department of Gastroenterology, Leuven, Belgium

University of Calgary, IBD unit, division of Gastroenterology and Hepatology, Calgary, Canada

¹IPAM e.V., Wismar, Germany, ²Ingress Health HWM GmbH, Wismar, Germany, ³Takeda Pharma Vertrieb GmbH & Co. KG, Berlin, Germany, ⁴AOK Plus, Dresden, Germany, ⁵GWQ Serviceplus AG, Düsseldorf, Germany, ⁶Gastroenterologische Gemeinschaftspraxis Minden, Minden, Germany

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