¹Instituto Português de Oncologia de Lisboa, Gastroenterology, Lisbon, Portugal, ²Jagiellonian University Medical College, Pediatrics, Gastroenterology and Nutrition, Krakow, Poland, ³School of Health Sciences and University Hospital of Ioannina, Gastroenterology, Ioannina, Greece, ⁴Erasmus Medical Center, Gastroenterology and Hepatology, Rotterdam, The Netherlands, ⁵Nanjing University Affiliated Jinling Hospital, Gastroenterology and Hepatology, Nanjing, China, ⁶Gastroenterology Outpatients Clinic, Leipzig, Germany, ⁷Mater Dei Hospital, Medicine, Msida, Malta, ⁸University of Padua, Surgery, Oncology and Gastroenterology – DiSCOG, Padova, Italy, ⁹Hospital Universitario de La Princesa, Gastroenterology, Madrid, Spain, ¹⁰Royal Victoria Infirmary, Gastroenterology, Newcastle Upon Tyne, UK, ¹¹Hospital Prof. Doutor Fernando Fonseca, Gastroenterology, Amadora, Portugal, ¹²Venizeleio General Hospital, Gastroenterology, Heraklion, Greece, ¹³Digestive diseases Institute, Shaare Zedek Medical Center, Jerusalem, Israel, ¹⁴Hospital Universitario de Canarias, Tenerife, Spain

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

¹University of New South Wales, Department of Medicine, Sydney, Australia, ²University of New South Wales, Sydney, Australia

¹Southampton Children's Hospital, Department of Paediatric Surgery, Southampton, UK, ²University Hospital Southampton, Department of Human Genetics and Genomic Medicine, Southampton, UK, ³University Hospital Southampton, NIHR Southampton Biomedical Research Centre, Southampton, UK

¹Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, SP, Brazil, Surgery and Anatomy, Ribeirão Preto, SP, Brazil, ²Ribeirão Preto Medical School, University of São Paulo, Division of Gastroenterology, Department of Medicine, Ribeirão Preto - SP, Brazil

¹University Hospital, Gastroenterology, Santiago de Compostela, Spain

¹MSD, Luzern, Switzerland, ²Clinique Jules Verne, Paris, France, ³Paracelsus Private Medical University, Salzburg, Austria, ⁴Gastroenterologie, Remscheid, Germany, ⁵Charité Universitätsmedizin, Berlin, Germany, ⁶KU Leuven, Leuven, Belgium, ⁷MSD Italy, Rome, Italy

¹Division of Gastroenterology, Department of Medicine, Ribeirão Preto Medical School, University of São Paulo, Brazil, Ribeirao Preto, Brazil, ²Division of Coloproctology, Department of Surgery and Anatomy, Ribeirão Preto Medical School, University of São Paulo, Brazil, Ribeirao Preto, Brazil

¹Nova Scotia Health Authority, Halifax, Canada, ²Dalhousie University, Halifax, Canada, ³University of Alberta, Edmonton, Canada

¹Kitasato University Kitasato Institute Hospital, Center for Advanced IBD Research and Treatment, Tokyo, Japan, ²Kitasato University Kitasato Institute Hospital, Department of Clinical Laboratory, Tokyo, Japan, ³Kitasato University Kitasato Institute Hospital, Department of Gastroenterology and Hepatology, Tokyo, Japan

¹S. Giovanni Addolorata Hospital, Gastroenterology and Digestive Endoscopy, Rome, Italy, ²S. Giovanni Addolorata Hospital, Anatomy and Pathological Histology, Rome, Italy

¹Ulm University Hospital, Department of Internal Medicine I, Ulm, Germany, ²Ulm University Hospital, Department of Psychosomatic Medicine and Psychotherapy, Ulm, Germany, ³Krankenhaus Blaubeuren, Innere Medizin, Blaubeuren, Germany, ⁴Krankenhaus Biberbach, Innere Medizin, Biberach, Germany

¹Venizeleio General Hospital, Gastroenterology, Heraklion, Greece, ²Venizeleio General Hospital, Thoracic Medicine, Heraklion, Greece

¹Sapienza University of Rome, Department of Pediatrics, Pediatric Gastroenterology Unit, Rome, Italy

¹St Mark's Hospital, London, UK, ²Imperial College, London, UK

¹Fundeni Clinical Institute, Gastroenterology, Bucharest, Romania

¹IBD Clinic, Department of Gastroenterology, Instituto Nacional de Ciencias Medicas y Nutricion, Gastroenterology, Mexico, Mexico, ²Instituto Nacional de Ciencias Medicas y Nutricion, Endoscopy, Mexico, Mexico, ³Instituto Nacional de Ciencias Medicas y Nutricion, Pathology, Mexico, Mexico

¹Oslo University Hospital, Department of Gastroenterology, Oslo, Norway, ²University of Oslo, Faculty of Medicine, Oslo, Norway, ³Akershus University Hospital, Department of Gastroenterology, Oslo, Norway, ⁴Telemark Hospital Trust, Department of Gastroenterology, Skien, Norway, ⁵Vestfold Hospital Trust, Department of Research and Innovation, Tønsberg, Norway, ⁶Sørlandet Hospital Trust, Department of Gastroenterology, Arendal, Norway

¹GoodGut SL, Girona, Spain, ²Universitat de Girona, Microbiology, Girona, Spain, ³Institut de Investigació Biomèdica de Girona, Girona, Spain, ⁴Hospital Universitari Dr. Josep Trueta, Girona, Spain, ⁵Hospital Universitari de Bellvitge, Hospitalet de Llobregat, Spain, ⁶Hospital Universitari Germans Trias I Pujol, CIBEREHD, Badalona, Spain, ⁷Hospital de Santa Caterina, Salt, Spain, ⁸Centro Médico Teknon, Barcelona, Spain