¹McMaster University, Gastroenterology, Hamilton, ON, Canada, ²Mount Sinai Hospital, Toronto, Canada

¹McGill University Health Centre, Department of Gastroenterology, Montreal, Canada, ²Geneva's University Hospitals and University of Geneva, Division of Gastroenterology and Hepatology, Geneva, Switzerland

Galway University Hospital, Gastroenterology, Galway, Ireland

¹Nancy University Hospital, Department of Gastroenterology, Vandoeuvre-lès-Nancy, France, ²Imelda GI Clinical Research Centre, Department of Gastroenterology, Bonheiden, Belgium, ³Nancy University Hospital, Clinical Research Support Facility PARC, Vandoeuvre-lès-Nancy, France

¹All India Institute of Medical Sciences, Department of Gastroenterology and Human Nutrition, New Delhi, India, ²All India Institute of Medical Sciences, Gastroenterology, New Delhi, India, ³All India Institute of Medical Sciences, Department of Biostatistics, New Delhi, India

Kagawa Prefectural Central Hospital, Department of Gastroenterology, Takamatsu, Kagawa, Japan

¹Centre Hospitalier Universitaire Vaudois, Gastroenterology and Hepatology, Lausanne, Switzerland, ²University Hospital Zurich, Zurich, Switzerland, ³Helsana Health Insurance, Zurich, Switzerland

¹Leiden University Medical Center, Gastroenterology and Hepatology, Leiden, The Netherlands, ²HagaZiekenhuis, Gastroenterology and Hepatology, The Hague, The Netherlands, ³Leiden University Medical Center, Medical Psychology, Leiden, The Netherlands, ⁴Leiden University Medical Center, Medical Statistics, Leiden, The Netherlands

¹St Mark's Hospital, Colorectal Surgery, London, UK, ²Patient representative, London, UK, ³Patient Representative, Liverpool, UK, ⁴Patient Representative, London, UK, ⁵Sheffield Teaching Hospitals NHS Trust, Northern General Hospital, Department of Colorectal Surgery, Sheffield, UK, ⁶University Hospital South Manchester, Department of Colorectal Surgery, Manchester, UK, ⁷St Mark’s Hospital, IBD/Physiology, London, UK, ⁸Addenbrooke's Hospital, Cambridge University Hospitals NHS Foundation Trust, Department of Colorectal Surgery, Cambridge, UK

¹University Hospital Heraklion, Department of Gastroenterology, Heraklion, Greece, ²University of Athens, School of Medicine, Department of Basic Medical Science, Laboratory of Biology, Athens, Greece

Tokyo Women’s Medical University, Department of Gastroenterology, Tokyo, Japan

¹Aretaieion Hospital, 2nd Surgical Department, Athens, Greece, ²St Bartholomew’s Hospital, Radiology Department, London, UK

¹Assaf Harofeh Medical Center, The Kamila Gonczarowski Institute of Gastroenterology Assaf Harofeh Medical Center, Zerifin, Israel, ²Tel Aviv University Sackler School of Medicine, Internal Medicine, Tel Aviv, Israel, ³Tel Aviv University Sackler School of Medicine, Internal Medicine, Tel Aviv, Israel, ⁴Shaare Zedek Medical Center, Department of Gastroenterology and Digestive Diseases, Jerusalem, Israel, ⁵Meir Medical Center, Gastroenterology, Kfar Saba, Israel

Cedars-Sinai Medical Center, Los Angeles, USA

¹St Vincent's University Hospital/UCD, Centre for Colorectal Disease, Dublin, Ireland, ²University Hospital Galway/NUIG, Galway, Ireland, ³St James' Hospital/TCD, Dublin, Ireland, ⁴Initiative IBD Research Network, Ireland, Ireland, ⁵Our Lady's Hospital Drogheda/RCSI, Drogheda, Ireland

¹McMaster University, Internal Medicine, Hamilton, Canada, ²McMaster University, Gastroenterology, Hamilton, Canada, ³Mayo Clinic, Colon and Rectal Surgery, Rochester, USA, ⁴Icahn School of Medicine at Mount Sinai, Gastroenterology, New York, USA, ⁵Mayo Clinic, Surgery, Rochester, USA

¹Nancy University Hospital, Department of Gastroenterology, Vandoeuvre-lès-Nancy, France, ²Saint-Etienne University Hospital, Department of Gastroenterology, Saint-Etienne, France, ³Imelda GI Clinical Research Centre, Department of Gastroenterology, Bonheiden, Belgium, ⁴Nancy University Hospital, Department of Immunology, Nancy, France, ⁵Lyon-Sud Hospital, Department of Gastroenterology, Pierre-Bénite, France, ⁶Saint-Etienne University Hospital, Department of Immunology, Saint-Etienne, France

¹Montpellier University Hospital, Gastroenterology, Montpellier, France, ²Lille University Hospital, Gastroenterology, Lille, France, ³Henri-Mondor University Hospital, Gastroenterology, Creteil, France, ⁴Caen University Hospital, Gastroenterology, Caen, France, ⁵Bordeaux University Hospital, Gastroenterology, Bordeaux, France, ⁶CHU University Hospital, Department of Hepatology and Gastroenterology, Nîmes, France, ⁷Lyon University Hospital, Gastroenterology, Lyon, France, ⁸Nancy University Hospital, Gastroenterology, Nancy, France

¹Erasmus MC, Gastroenterology and Hepatology, Rotterdam, The Netherlands, ²VU University Medical Centre, Gastroenterology and Hepatology, Amsterdam, The Netherlands, ³University Medical Center Groningen and University of Groningen, Gastroenterology and Hepatology, Groningen, The Netherlands, ⁴Franciscus Hospital and Vlietland Hospital, Gastroenterology and Hepatology, Rotterdam, The Netherlands, ⁵Zuyderland Medical Center, Clinical Gastroenterology and Hepatology, Heerlen-Sittard-Geleen, The Netherlands, ⁶Radboud University Nijmegen Medical Center, Gastroenterology and Hepatology, Nijmegen, The Netherlands

¹Hospital for Sick Children, University of Toronto, Toronto, Canada, ²University of Calgary, Medicine, Calgary, Canada, ³Imperial College Healthcare, London, UK, ⁴Ludwig-Maximilians-University Munich, Munich, Germany, ⁵Center of Endoscopy, Starnberg, Germany