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

¹Internistische Gemeinschaftspraxis für Verdauungs- und Stoffwechselkrankheiten Leipzig und Schkeuditz, Leipzig, Germany, ²Praxis Gruemmer, Potsdam, Germany, ³Magen Darm Zentrum, Remscheid, Germany, ⁴MVZ für Gastroenterologie am Bayerischen Platz, Berlin, Germany, ⁵Gastroenterologische Gemeinschaftspraxis am Germania-Campus, Muenster, Germany, ⁶MSD Merck Sharp and Dohme AG, Global Medical Affairs, Kriens, Switzerland, ⁷MSD Sharp and Dohme GmbH, Medical Affairs, Haar, Germany

¹University Medical Centre Utrecht, Department of Gastroenterology and Hepatology, Utrecht, The Netherlands, ²University Medical Centre Utrecht, Laboratory for Translational Immunology, Utrecht, The Netherlands, ³University Medical Centre Utrecht, Julius Centre for Health Sciences and Primary Care, Utrecht, The Netherlands, ⁴Tergooi hospitals, Department of Gastroenterology and Hepatology, Blaricum/Hilversum, The Netherlands, ⁵AZ Delta, Department of Gastroenterology, Roeselare, Belgium, ⁶Hôpital Haut-Lévêque, Service d'Hépato-gastroentérologie et Oncologie Digestive, Bordeaux, France, ⁷Imelda General Hospital, IBD Clinic, Bonheiden, Belgium, ⁸Beaujon Hospital, APHP, Paris Diderot University, Department of Gastroenterology, Clichy, France, ⁹Estaing University Hospital, Department of Gastroenterology, Clermont-Ferrand, France, ¹⁰AZ Damiaan, Department of Gastroenterology, Oostende, Belgium, ¹¹Liège University Hospital CHU, Department of Gastroenterology, Liège, Belgium, ¹²Huriez Hospital, Lille 2 University, Department of Gastroenterology, Lille, France, ¹³Maastricht University Medical Centre, Department of Gastroenterology and Hepatology, Maastricht, The Netherlands, ¹⁴Erasmus Medical Centre, Department of Gastroenterology and Hepatology, Rotterdam, The Netherlands, ¹⁵Amsterdam UMC, University of Amsterdam, Department of Gastroenterology, Amsterdam, The Netherlands, ¹⁶University Hospitals Leuven, Department of Gastroenterology and Hepathology, Leuven, Belgium

¹University Hospital of Ioannina, Division of Gastroenterology, Ioannnina, Greece, ²University Hospital of Ioannina, Universital Eye Clinic, Ioannnina, Greece

¹Hannover Medical School (MHH), Gastroenterology, Hepatology and Endocrinology, Hannover, Germany, ²Hannover Medical School (MHH), Institute for Sports Medicine, Hannover, Germany

¹Hospital Universitario y Politécnico La Fe, Gastroenterology, Valencia, Spain, ²Hospital Universitario y Politécnico La Fe, Pharmacy, Valencia, Spain

¹Erasmus MC-Sophia Children’s Hospital, 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, ⁴Erasmus MC, Department of Gastroenterology, Rotterdam, The Netherlands, ⁵Haga Hospital, Department of Gastroenterology, The Hague, The Netherlands, ⁶Juliana Children’s Hospital, Department of Paediatrics, The Hague, The Netherlands, ⁷Albert Schweitzer Hospital, Department of Paediatrics, Dordrecht, The Netherlands, ⁸University of Amsterdam, Research Institute of Child Development and Education, Amsterdam, The Netherlands, ⁹Academic Center for Child Psychiatry the Bascule, Department of Child and Adolescent Psychiatry, Amsterdam, The Netherlands

¹University of Pavia, Pavia, Italy, ²The Edinburgh IBD Unit, Western General Hospital, Edinburgh, UK

¹Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, SP, Brazil, Surgery and Anatomy, Ribeirão Preto, SP, Brazil, ²Universidade Federal de Juiz de Fora, Juiz de Fora, MG, Brazil, ³Universidade Federal de São Paulo (Unifesp), São Paulo, Brazil, ⁴Clínica Reis Neto, Campinas, SP, Brazil, ⁵Universidade de Passo Fundo - RG, Passo Fundo / RG, Brazil

¹Hyogo College of Medicine, Inflammatory Bowel Disease, Nishinomiya, Japan, ²Hyogo College of Medicine, Intestinal Inflammation Research, Nishinomiya, Japan

¹Coimbra Hospital and University Centre, Gastroenterology, Coimbra, Portugal

¹The University of Tokyo, Surgery, Tokyo, Japan

¹University Hospital of Ioannina, Division of Gastroenterology, Ioannnina, Greece

¹Tillotts Pharma AG, Medical Affairs, Rheinfelden, Switzerland, ²Tillotts Pharma, Medical Affairs, Rheinfelden, Switzerland

¹University of California, San Diego, Division of Gastroenterology, La Jolla, CA, USA, ²Hospital Clínic de Barcelona, IDIBAPS, CIBERehd, Barcelona, Spain, ³University of Calgary, Calgary, AB, Canada, ⁴Academic Medical Centre, Department of Gastroenterology, Amsterdam, The Netherlands, ⁵Icahn School of Medicine at Mount Sinai, Dr. Henry D. Janowitz Division of Gastroenterology, New York, NY, USA, ⁶Pfizer Inc., Collegeville, PA, USA

¹Hospital del Mar, Gastroenterology, Barcelona, Spain, ²Parc Científic de Barcelona (PCB/UB)., Traslational Immunology, Barcelona, Spain

¹Imperial College, London, UK, ²Humanitas Research Hospital, Milan, Italy, ³Academic Medical Center, Amsterdam, The Netherlands, ⁵St Mark's Hospital, Harrow, UK

¹The Sixth Affiliated Hospital, Sun Yat-sen University, Department of Gastroenterology, Guangzhou, China, ²Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Department of Gastroenterology, Hangzhou, China, ³School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou, China

¹St.Vincent's University Hospital, Center for Colorectal Disease, Dublin, Ireland, ²Beth Israel Deaconess Medical Center, Gastroenterology, Boston, USA, ³Harvard Medical School, Boston, USA

¹Western General Hospital, NHS Lothian, Edinburgh, UK