¹DGD Clinics Sachsenhausen, Frankfurt/Main, Germany, ²Interdisciplinary Crohn Colitis Centre Rhein-Main, Frankfurt/Main, Germany, ³Hacettepe University, Faculty of Health Sciences, Ankara, Turkey

¹Department of Gastroenterology and Hepatology, Linköping, Sweden, ²Department of Pathology, Linköping, Sweden, ³Department of Gastroenterology and Hepatology, Linköping, Sweden

Beaumont Hospital, Colorectal and General Surgery, Dublin, Ireland

¹King's College London, Faculty of Nursing and Midwifery and Palliative Care, London, UK, ²King's College London, Health Psychology Section, London, UK, ³Imperial College Healthcare NHS Trust, Pain Service, London, UK, ⁴King's College London, Faculty of Life Sciences and Medicine, London, UK

¹Russells Hall Hospital, Gastroenterology, Birmingham, UK, ²Solihull Hospital, Gastroenterology, Birmingham, UK, ³New Cross Hospital, Gastroenterology, Birmingham, UK, ⁴Queen Elizabeth Hospital, Gastroenterology, Birmingham, UK, ⁵Walsall Manor Hospital, Gastroenterology, Birmingham, UK

¹University of Pisa, New Technologies and Translational Medicine, Pisa, Italy, ²Pisa University Hospital, General Surgery and Gastroenterology, Pisa, Italy

Yokkaichi Hazu Medical Centre, Inflammatory Bowel Disease Centre, Yokkaichi, Japan

¹Hospital Universitario de Gran Canaria Dr. Negrin, Gastroenterology, Las Palmas, Spain, ²Hospital Universitario de Gran Canaria Dr. Negrin, Investigation Unit, Las Palmas, Spain, ³Hospital Universitario de Gran Canaria Dr. Negrin, Clinical Analisys Laboratory, Las Palmas, Spain

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, ³University Hospitals Leuven, Dpt. Abdominal Surgery, Leuven, Belgium

Fukuoka University Chikushi Hospital, Chikushino, Japan

¹St Mark's Hospital, Colorectal Surgery, London, UK, ²Università della Campania “Luigi Vanvitelli”, Naples, Italy, ³University of Kelaniya, Kelaniya, Sri Lanka, ⁴Academic Medical Center (AMC) University of Amsterdam, Amsterdam, The Netherlands, ⁵St Mark's Hospital, IBD/Physiology, London, UK, ⁶St Mark's Hospital, Gastrointestinal Imaging, London, UK

St Vincent's Hospital Melbourne, Department of Gastroenterology, Melbourne, Australia

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