¹Coreva Scientific, Freiburg im Breisgau, Germany, ²Medtronic Gastrointestinal and Hepatology, Duluth, USA, ³Illinois Gastroenterology Group, Elgin, USA

¹Chung-Ang University College of Medicine, Department of internal medicine, Seoul, South Korea, ²Yonsei University College of Medicine, Department of Internal Medicine and Institute of Gastroenterology, Seoul, South Korea, ³Seoul National University College of Medicine, Department of Internal Medicine and Liver Research Institute, Seoul, South Korea, ⁴Kyung Hee University Hospital, Department of Gastroenterology, Seoul, South Korea, ⁵The Catholic University of Korea St. Vincent's Hospital, Department of Gastroenterology, Suwon, South Korea, ⁶SMG-SNU Boramae Medical Center, Department of Gastroenterology, Seoul, South Korea, ⁷Ewha Womans University Mokdong Hospital, Department of Gastroenterology, Seoul, South Korea, ⁸Chosun University College of Medicine, Department of Internal Medicine, Gwagju, South Korea, ⁹The Catholic University of Korea Daejeon St. Mary’s Hospital, Department of Gastroenterology, Daejeon, South Korea, ¹⁰Ajou University School of Medicine, Department of Gastroenterology, Suwon, South Korea, ¹¹Korea University Anam Hospital, Department of Gastroenterology, Seoul, South Korea, ¹²Inje University Seoul Paik Hospital, Department of Gastroenterology, Seoul, South Korea, ¹³Inje University Haeundae Paik Hospital, Department of Gastroenterology, Busan, South Korea, ¹⁴Chonnam National University Hospital, Department of Gastroenterology, Gwagju, South Korea, ¹⁵Kangbuk Samsung Hospital, Sungkyunkwan University, Department of Internal Medicine, Seoul, South Korea, ¹⁶Inha University Hospital, Department of Gastroenterology, Incheon, South Korea, ¹⁷Kyungpook National University School of Medicine, Department of Internal Medicine, Daegu, South Korea, ¹⁸Abbvie Ltd., Seoul, South Korea, ¹⁹AbbVie Pte. Ltd., Singapore City, Singapore

¹Klinikum Fulda AG, Medical Clinic II Gastroenterology and Metabolic Disease, Fulda, Germany, ²Jena University Hospital, Clinic for Internal Medicine IV, Jena, Germany, ³Charité Medical Center, Virchow Hospital, Humboldt-University of Berlin, Department of Gastroenterology and Hepatology, Berlin, Germany, ⁴Gastroenterology Practise Minden, Minden, Germany, ⁵Waldfriede Hospital, Internal Medicine Department, Berlin, Germany, ⁶HaFCED e.K., Research Institute for IBD, Hamburg, Germany, ⁷Shield Therapeutics, London, UK, ⁸Purple Squirrel Economics, New York, USA

¹Semmelweis University, First Department of Medicine, Budapest, Hungary, ²McGill University Health Center, Department of Gastroenterology, Montreal, Canada, ³Geneva’s University Hospitals and University of Geneva, Division of Gastroenterology and Hepatology, Geneva, Switzerland

¹Guy's and St Thomas' Hospital, Gastroenterology, London, UK, ²King's College London, School of Immunology and Microbial Sciences, London, UK

¹St.Vincent's University Hospital, Gastroenterology, Dublin, Ireland, ²St Vincent's University Hospital, Centre for Colorectal Disease, Dublin, Ireland, ³University College Dublin, School of Medicine, Dublin, Ireland, ⁴St.Vincent's University Hospital, Center for Colorectal Disease, Dublin, Ireland, ⁵Sanquin Blood Supply - Diagnostic Services, Biologicals Laboratory, Amsterdam, The Netherlands, ⁶Academic Medical Center (AMC), Department of Gastroenterology, Amsterdam, The Netherlands

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

¹Akershus University Hospital, Department of Gastroenterology, Lørenskog, Norway, ²Diakonhjemmet Hospital, Department of Rheumatology, Oslo, Norway, ³Oslo University Hospital, Research Support Services CTU, Oslo, Norway, ⁴Oslo University Hospital, Radiumhospitalet, Department of Medical Biochemistry, Oslo, Norway, ⁵Oslo University Hospital, Rikshospitalet, Department of Gastroenterology, Oslo, Norway, ⁶University of Oslo, Faculty of Medicine, Oslo, Norway, ⁷Ålesund Hospital, Department of Gastroenterology, Ålesund, Norway, ⁸Norwegian University of Science and Technology, Faculty of Medicine, Trondheim, Norway

¹KU Leuven, Leuven, Belgium, ²UZ Leuven, Leuven, Belgium

¹Ferring International Center, St-Prex, Switzerland, ²Ferring International PharmaScience Center, Copenhagen, Denmark, ³Strategen Ltd., Basingstoke, UK, ⁴PHARMO Institute for Drug Outcomes Research, Utrecht, The Netherlands

¹Sheba Medical Center and Sackler School of Medicine, Gastroenterology, Tel Hashomer, Israel, ²Rambam Health Care Campus, Bruce & Ruth Rappaport School of Medicine, Technion Institute of Technology, Department of Gastroenterology, Haifa, Israel, ³The First Affiliated Hospital of Sun-Yatsen University, Guangzhou, China, ⁴Rambam Health Care Campus and Bruce Rappaport School of Medicine, Technion Institute of Technology, Department of Gastroenterology, Haifa, Israel

¹Oregon Health and Science University, Portland, OR, USA, ²Mayo Clinic, Division of Gastroenterology and Hepatology, Rochester, MN, USA, ³University of Alberta, Division of Gastroenterology, Edmonton, AB, Canada, ⁴Medical University of Vienna, Department of Internal Medicine III, Vienna, Austria, ⁵Pfizer Inc., Collegeville, PA, USA

Hyogo College of Medicine, Inflammatory Bowel Disease, Nishinomiya, Japan

University Hospital Tuebingen, Gastroenterology, Tuebingen, Germany

¹Radboud University Medical Centre, Gastroenterology and Hepatology, Nijmegen, The Netherlands, ²Jeroen Bosch Hospital, Gastroenterology and Hepatology, Hertogenbosch, The Netherlands, ³Sanquin Diagnostic Services, Biologics Laboratory, Amsterdam, The Netherlands

¹Aristotle University, Clinical Research and Evidence-Based Medicine Unit, Second Medical Department, Thessaloniki, Greece, ²“Papageorgiou” Hospital, 1st Department of Internal Medicine, Thessaloniki, Greece, ³Aristotle University, Second Propedeutic Medical Department, Thessaloniki, Greece, ⁴University of Oxford, Harris Manchester College, Oxford, UK

¹Seoul National University Hospital Gangnam Center, Internal Medicine, Seoul, South Korea, ²Wongkwang University Hospital, Internal Medicine, Iksan, South Korea, ³University of Ulsan College of Medicine, Internal Medicine, Seoul, South Korea, ⁴Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Internal Medicine, Seoul, South Korea, ⁵College of Medicine, Ewha Womans University, Internal Medicine, Seoul, South Korea, ⁶Seoul National University Hospital, Internal Medicine, Seoul, South Korea, ⁷Korea University Ansan Hospital, Internal Medicine, Ansan-si, South Korea, ⁸Keimyung University School of Medicine, Internal Medicine, Daegu, South Korea, ⁹Chonnam National University Medical School, Internal Medicine, Gwangju, South Korea, ¹⁰St. Vincent's Hospital, Internal Medicine, Suwon, South Korea, ¹¹Korea University Hospital, Internal Medicine, Seoul, South Korea

¹Virgen Macarena Hospital, Gastroenterology, Sevilla, Spain, ²Virgen Macarena Hospital, Pharmacy Unit, Sevilla, Spain

¹Charité–Universitätsmedizin Berlin, Campus Benjamin Franklin, Department for Medicine (Gastroenterology, Infectious diseases, Rheumatology), Berlin, Germany, ²Berlin Institute of Health, Berlin, Germany

¹University of Szeged, First Department of Medicine, Szeged, Hungary, ²University of Szeged, Department of Medical Physics and Informatics, Szeged, Hungary, ³Institute of Laboratory Medicine, Szeged, Hungary, ⁴University of Debrecen Clinical Center, Department of Laboratory Medicine, Debrecen, Hungary, ⁵University of Debrecen, 2nd Department of Internal Medicine, Debrecen, Hungary