¹Department of Gastroenterology, King's College Hospital NHS Foundation Trust, London, UK, ²Department of Gastroenterology, The Pennine Acute Hospitals NHS Trust, Manchester, UK, ³Manchester Academic Health Sciences Centre, University of Manchester, Manchester, UK, ⁴Department of Gastroenterology, Leeds Teaching Hospitals NHS Trust, Leeds, UK, ⁵Department of Gastroenterology, East Kent Hospital University Foundation Trust, Margate, UK, ⁶Department of Gastroenterology, Maidstone and Tunbridge Wells NHS Trust, Tunbridge Wells, UK

¹Interdisciplinary Crohn Colitis Centre Rhein-Main, Frankfurt/Main, Germany, ²DGD Clinics Sachsenhausen, Frankfurt/Main, Germany, ³Gastroenterological practice, Göppingen, Germany, ⁴Gastroenterological practice, Cottbus, Germany, ⁵Vifor Pharma Deutschland GmbH, Munich, Germany, ⁶Agaplesion Markus Krankenhaus, Department of Gastroenterology, Frankfurt/Main, Germany

¹Faculty of Medicine and Health, Örebro University, Örebro, Sweden, ²Clinical Epidemiology and Biostatistics, School of Medical Sciences, Örebro University, Örebro, Sweden

¹LUMC, Gastroenterology-Hepatology, Leiden, The Netherlands, ²Lumc, Geriatrics and Gerontology, Leiden, The Netherlands

Osaka city university, gastroenterology, Osaka, Japan

¹IBD clinical and research centre, Iscare, Prague, Czech Republic, ²Department of Internal medicine, University Hospital Plzen, Plzen, Czech Republic, ³Department of Internal medicine, Thomayer University Hospital, Prague, Czech Republic, ⁴Department of Paediatrics, 2nd Faculty of Medicine, Charles University in Prague and Motol University Hospital, Prague, Czech Republic, ⁵Department of Paediatric Surgery, 2nd Faculty of Medicine, Charles University in Prague and Motol University Hospital, Prague, Czech Republic, ⁶General paediatrician, Prague, Czech Republic

¹University Hospitals Leuven, Leuven, Belgium, ²McMaster University, Hamilton, Ontario, Canada, ³Pfizer, Cambridge, USA, ⁴Shire, Lexington, USA, ⁵Zymo Consulting Group, Newtown Square, USA

Hospital Beatriz Ângelo, Gastroenterology Department, Loures, Portugal

¹St James University Hospital, Gastroenterology, Leeds, UK, ²Royal Devon and Exeter Foundation Trust, Gastroenterology, Exeter, UK

¹Capital Digestive Care, Chevy Chase Clinical Research, Chevy Chase, USA, ²Gastroenterology Practice, Minden, Germany, ³University of California San Diego, Division of Gastroenterology, La Jolla, USA, ⁴Medical University of Vienna, Department Internal Medicine III, Vienna, Austria, ⁵Shafran Gastroenterology Research Center, Winter Park, USA, ⁶Jena University Hospital, Department of Internal medicine IV, Jena, Germany, ⁷Praxis für Gastroenterologie, Heidelberg, Germany, ⁸Takeda Pharmaceuticals International AG, Global Medical Affairs, Zurich, Switzerland, ⁹Takeda Development Centre Europe Ltd., Evidence and Value Generation, London, UK, ¹⁰Takeda Pharmaceuticals International AG, Zurich, Switzerland, ¹¹Christian-Albrechts-University, Institute for Clinical Molecular Biology, Kiel, Germany

Hospital Beatriz Ângelo, Gastroenterology Department, Loures, Portugal

¹Hospital Santa Creu i Sant Pau, Barcelona, Spain, ²Hospital Ramón y Cajal, Madrid, Spain, ³Hospital Moisès Broggi, Sant Joan Despi, Spain, ⁴Hospital Universitari Germans Trias i Pujol, Badalona, Spain, ⁵Hospital Universitari de Bellvitge, L'Hospitalet de Llobregat, Spain, ⁶Ciberehd, Madrid, Spain

All India Institute Of Medical Sciences, Gastroenterology and Human Nutrition, New Delhi, India

¹Tamperee University Hospital, Gastroenterology, Tampere, Finland, ²Tampere University, Tampere, Finland

¹Hospital General Universitario Alicante, Alicante, Spain, ²CIBERehd, Madrid, Spain, ³Hospital San Juan, Alicante, Spain, ⁴Hospital General Universitario Elche, Elche, Spain

Copenhagen University Hospital, Herlev, Department of Gastroenterology, Herlev, Denmark

¹Hospital Universitario de La Princesa, Gastroenterology Unit, Madrid, Spain, ²Instituto de Investigación Sanitaria Princesa (IIS-IP), Madrid, Spain, ³Universidad Autónoma de Madrid, Madrid, Spain, ⁴Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBEREHD), Madrid, Spain

¹Rambam Health Care Campus, Haifa, Israel, ²Sheba Medical Center, Gastroenterology, Ramat Gan, Israel, ³IDF Medical Corps, Tel Hashomer, Israel, ⁴Schneider Children's Medical Center, Gastroenterology, Petach Tikva, Israel

¹Korea University Ansan Hospital, Division of Gastroenterology and Hepatology, Ansan, South Korea, ²Korea University Guro Hospital, Division of Gastroenterology and Hepatology, Seoul, South Korea, ³Korea University Anam Hospital, Division of Gastroenterology and Hepatology, Seoul, South Korea

¹Yonsei University College of Medicine, Department of Internal Medicine, Seoul, South Korea, ²Yonsei University College of Medicine, Institute of Gastroenterology, Seoul, South Korea, ³Gangnam Severance Hospital, Yonsei University College of Medicine, Department of Internal Medicine, Institute of Gastroenterology, Seoul, South Korea