¹University of Birmingham, Birmingham, UK, ²Janssen, Inc., Toronto, Canada, ³Janssen-Cilag, Cologno Monzese MI, Italy, ⁴Janssen Scientific Affairs, LLC, Horsham, USA, ⁵University Hospital Gasthuisberg, Department of Gastroenterology, Leuven, Belgium, ⁶Icahn School of Medicine at Mount Sinai, New York, USA, ⁷Northwestern University Feinberg School Of Medicine, Chicago, USA, ⁸University of Western Ontario and Robarts Research Institute, London, Canada

¹Gastroenterology Department, Lille, France, ²Department of Digestive Diagnostic and Interventional Radiology, Lille, France

¹McGill University, Gastroenterology, Montreal, Canada, ²University of British Columbia, Department of Gastroenterology, Vancouver, Canada

¹Sheba Medical Center, Department of Diagnostic Imaging, Tel Hashomer, Israel, ²Sheba Medical Center, Gastroenterology, Tel Hashomer, Israel, ³Sheba Medical Center, Gastroenterology, Ramat Gan, Israel

¹Chaim Sheba Medical Center, Gastroenterology, Ramat Gan, Israel, ²Chaim Sheba Medical Center, Diagnostic Imaging, Ramat Gan, Israel

¹McMaster University, Gastroenterology, Hamilton, ON, Canada, ²McMaster University, Gastroenterology, Hamilton, Canada, ³Mount Sinai Hospital, Gastroenterology, New York, USA

¹University Hospital Zurich, Division of Gastroenterology and Hepatology, Zurich, Switzerland, ²University Hospital Lausanne - CHUV, Institute of Social and Preventive Medicine, Lausanne, Switzerland, ³University Hospital Lausanne, Division of Gastroenterology and Hepatology, Lausanne, Switzerland, ⁴University of Bern, Institute of Social and Preventive Medicine, Bern, Switzerland

¹University of Liverpool, Department of Gastroenterology, Liverpool, UK, ²Hope Hospital, Department of Gastroenterology, Salford, UK, ³Royal Liverpool University Hospital, Liverpool, UK

Birmingham Children's Hospital, Gastroenterology, Birmingham, UK

¹Hokkaido University Graduate School of Medicine, Department of Gastroenterology and Hepatology, Sapporo, Japan, ²Hokkaido University Hospital, Diagnostic Center for Sonography, Sapporo, Japan, ³National Hospital Organization Hakodate Hospital, Department of Gastroenterology, Hakodate, Japan, ⁴Tomakomai City Hospital, Department of Clinical Laboratory, Tomakomai, Japan, ⁵Tomakomai City Hospital, Department of Gastroenterology, Tomakomai, Japan, ⁶Sapporo Higashi Tokushukai Hospital, Department of Clinical Laboratory, Sapporo, Japan, ⁷Sapporo Higashi Tokushukai Hospital, Inflammatory Bowel Disease Center, Sapporo, Japan, ⁸Ohguro Gastroenterological Hospital, Department of Clinical Laboratory, Sapporo, Japan, ⁹Ohguro Gastroenterological Hospital, Department of Gastroenterology, Sapporo, Japan, ¹⁰Sapporo Medical Center NTT EC, Department of Clinical Laboratory, Sapporo, Japan, ¹¹Sapporo Medical Center NTT EC, Department of Gastroenterology, Sapporo, Japan

¹Nordic Bioscience, Biomarkers and Research, Herlev, Denmark, ²Odense University Hospital, Department of Gastroenterology, Odense, Denmark, ³Aarhus University Hospital, Department of Hepatology and Gastroenterology, Aarhus, Denmark

¹John Radcliffe Hospital, University of Oxford, Translational Gastroenterology Unit, Oxford, UK, ²The Churchill Hospital, Oxford University Hospital, Department of Medical Oncology, Oxford, UK

¹Hospital da Senhora da Oliveira-Guimarães, Gastroenterology, Guimarães, Portugal, ²University of Minho, Life and Health Sciences Research Institute (ICVS), School of Medicine, Braga, Portugal, ³University of Minho, ICVS/3B’s, PT Government Associate Laboratory, Braga, Portugal

¹APHP St. Antoine Hospital, Department of Gastroenterology and Nutrition, Paris, France, ²APHP Cochin Hospital, Dermatology, Paris, France

¹Queen Elizabeth Hospital, Department of Medicine, Hong Kong, Hong Kong, ²Inflammatory Bowel Disease Center University of Chicago Medicine, Chicago, USA, ³University Hospital Estaing, Gastroenterology Department, Clermont-Ferrand, France, ⁴UMR 1071 Inserm/Université d'Auvergne; USC-INRA 2018, Microbes, Intestine, Inflammation and Susceptibility of the Host, Clermont-Ferrand, France, ⁵University Hospital, Biostatistics Unit, DRCI, Clermont-Ferrand, France

¹University of Duisburg-Essen, Integrative Gastroenterology, Kliniken Essen-Mitte, Essen, Germany, ²Tech Lab Inc., Blacksburg, USA, ³Labor L+S, Enterosan, Bad Bocklet-Grossenbrach, Germany, ⁴Ruhr University Bochum, Pathology Department, Bochum, Germany

¹Kazan State Medical University, Kazan, Russian Federation, ²Republican Clinical Hospital, Kazan, Russian Federation

¹Medical University of Bialystok, Poland, Department of Pediatrics, Gastroenterology, Hepatology, Nutrition and Allergology, Bialystok, Poland, ²Medical University of Bialystok, Poland, Department of Gastroenterology and Internal Medicine, Bialystok, Poland, ³Medical University of Bialystok, Poland, Department of Pathomorphology, Bialystok, Poland, ⁴The Children's Memorial Health Institute, Warsaw, Department of Gastroenterology, Hepatology, Feeding Disorders and Paediatrics, Warsaw, Poland

¹Medical School and University Hospital of Ioannina - Greece, Department of Gastroenterology and Hepatology, Ioannina, Greece, ²Beth-Israel Deaconess Medical Center, Harvard Medical School, Center for Inflammatory Bowel Diseases, Division of Gastroenterology, Boston, Massachussets, USA, ³University Hospital of Nancy, University of Lorraine, INSERM Unité 954 and Department of Hepato-Gastroenterology, Houdemont, France, ⁴Mater Dei Hospital, Division of Gastroenterology, Malta, Malta

¹Erasmus MC-Sophia Children's Hospital, Department of Paediatric Gastroenterology, Rotterdam, The Netherlands, ²Erasmus MC-Sophia Children’s Hospital, Department of Child and Adolescent Psychiatry/Psychology, Rotterdam, The Netherlands, ³Erasmus MC, Department of Biostatistics, Rotterdam, The Netherlands, ⁴Amphia Hospital Breda, Department of Gastroenterology, Breda, The Netherlands, ⁵Amphia Hospital Breda, Department of Paediatrics, Breda, The Netherlands, ⁶Haga Hospital, Department of Gastroenterology, Den Haag, The Netherlands, ⁷Haga Hospital, Department of Paediatrics, Den Haag, The Netherlands, ⁸Academic Medical Center, Academic Center for Child Psychiatry the Bascule / Department of Child and Adolescent Psychiatry, Amsterdam, The Netherlands