¹Maastricht University Medical Centre, Department of Internal Medicine, Division of Gastroenterology and Hepatology, Maastricht, The Netherlands, ²Maastricht University Medical Centre, NUTRIM School for Nutrition and Translational Research in Metabolism, Maastricht, The Netherlands, ³Zuyderland Medical Centre, Department of Gastroenterology and Hepatology, Sittard-Geleen/Heerlen, The Netherlands

¹AZ Delta Roeselare Menen, Department of Gastroenterology, Roeselare, Belgium, ²Jan Yperman Hospital, Department of Gastroenterology, Ieper, Belgium, ³Sint-Jozefskliniek, Department of Gastroenterology, Izegem, Belgium, ⁴AZ Groeninge, Department of Gastroenterology, Kortrijk, Belgium, ⁵AZ St. Lucas, Department of Gastroenterology, Ghent, Belgium, ⁶AZ St. Lucas, Department of Gastroenterology, Brugge, Belgium

¹Radboudumc, Nijmegen, The Netherlands, ²Maastricht University Medical Center (MUMC), Maastricht, The Netherlands, ³Leiden University Medical Center (LUMC), Department of Gastroenterology and Hepatology, Leiden, The Netherlands, ⁴Erasmus Medical Center, Rotterdam, The Netherlands, ⁵VU University Medical Centre Institute of Education, Department of Gastroenterology and Hepatology, Room J393, Amsterdam, The Netherlands, ⁶University Medical Center Groningen, Groningen, The Netherlands, ⁷University Medical Centre Utrecht, Utrecht, The Netherlands, ⁸Academic Medical Center (AMC), Department of Gastroenterology and Hepatology, Amsterdam, The Netherlands, ⁹Radboudumc, Department of Gastroenterology and Hepatology, Nijmegen, The Netherlands

¹Beaujon Hospital, APHP, Colorectal Surgery, Clichy, France, ²CHU Bicetre, APHP, Department of Oncologic and Digestive Surgery, Le Kremlin-Bicetre, France, ³CHRU Lille, Department of Digestive Surgery and Transplantation, Lille, France, ⁴St Antoine Hospital, APHP, Digestive Surgery, Paris, France, ⁵CHU Bordeaux, Digestive Surgery, Bordeaux, France, ⁶CHRU Nancy, Digestive Surgery, Nancy, France, ⁷CHU Lyon-Sud, Digestive Surgery, Lyon, France, ⁸CHU Marseille-Nord, Digestive Surgery, Marseille, France, ⁹St Louis Hospital, APHP, Digestive Surgery, Paris, France, ¹⁰CHU Rennes, Digestive Surgery, Rennes, France, ¹¹CHU Nice, Digestive Surgery, Nice, France, ¹²CHU Toulouse, Digestive Surgery, Toulouse, France, ¹³Lariboisière Hospital, APHP, Digestive Surgery, Paris, France, ¹⁴Institut Mutualiste Montsouris, Digestive Surgery, Paris, France, ¹⁵CHU Rouen, Digestive Surgery, Rouen, France, ¹⁶CHU Nantes, Digestive Surgery, Nantes, France, ¹⁷CHU Grenoble, Digestive Surgery, Grenoble, France, ¹⁸Hopital St Joseph, Digestive Surgery, Paris, France, ¹⁹CHU Montpellier, Digestive Surgery, Montpellier, France, ²⁰Lariboisière Hospital, APHP, Departement of Clinical Research, Paris, France

University of Calgary, IBD Unit, Division of Gastroenterology and Hepatology, Calgary, Canada

¹Hospital Clinic de Barcelona, IDIBAPS, CIBERehd, Barcelona, Spain, ²The Royal London, Barts Health NHS Trust, London, UK, ³Internistische Gemeinschaftspraxis, Leipzig, Germany, ⁴Faculty of Medicine, Jena University, Jena, Germany, ⁵Lund University, Malmo, Sweden, ⁶Icahn School of Medicine at Mount Sinai, New York, USA, ⁷Merck Sharpe and Dohme, Kriens, Switzerland, ⁸Merck & Co., Inc., Kenilworth, USA, ⁹Universitätsklinik für Innere Medizin III, Vienna, Austria

¹Copenhagen University Hospital Hvidovre, The Gastro Unit, Medical Division, Hvidovre, Denmark, ²Zealand University Hospital, Medical Department, Køge, Denmark

¹Division of Surgery, Department of Clinical and Experimental Medicine, Faculty of Health Sciences, Linköping University and Department of Surgery, County Council of Östergötland, Linköping, Sweden, ²Department of Molecular Medicine and Surgery, Karolinska Institutet; Center for Digestive Disease, Division of Coloproctology, Karolinska University Hospital, Stockholm, Sweden, ³Department of Clinical Science and Education, Södersjukhuset, Karolinska Institutet; Clinical Epidemiology Unit, Department of Medicine Solna, Karolinska Institutet, Stockholm, Sweden, ⁴Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden, ⁵Department Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden; Department of Pediatrics, Örebro University Hospital, Örebro University, Örebro, Sweden; Division of Epidemiology and Public Health, School of Medicine, University of Nottingham, Nottingham, UK; Department of Medicine, Columbia University College of Physicians and Surgeons, New York, New York, USA, Stockholm, Sweden, ⁶Clinical Epidemiology Unit, Department of Medicine Solna, Karolinska Institutet, Stockholm, Sweden, ⁷Department of Clinical Science and Education, Södersjukhuset, Karolinska Institutet, Stockholm, Sweden; Clinical Epidemiology Unit, Department of Medicine Solna, Karolinska Institutet, Stockholm, Sweden; Department of pediatric gastroenterology and nutrition, Sachs' Children and Youth Hospital, Stockholm, Sweden

¹Cleveland Clinic, Department of Colon and Rectal Surgery, Cleveland, USA, ²Cleveland Clinic, Clinical Transformation, Cleveland, USA

¹University Hospital Münster, Department of Medicine B, Gastroenterology and Hepatology, Münster, Germany, ²University Hospital Münster, Department of Medicine B, Münster, Germany, ³University Hospital Frankfurt, Department of Internal Medicine 1, Frankfurt a.M., Germany, ⁴Cleveland Clinic Foundation, Cleveland, Ohio, USA, Department of Hospital Medicine, Medicine Institute, Cleveland, USA, ⁵Cleveland Clinic Foundation, Department of Quantitative Health Sciences, Lerner Research Institute, Cleveland, USA, ⁶University Hospital Tübingen, First Department of Internal Medicine I, Tübingen, Germany, ⁷Fukuoka University Chikushi Hospital, Department of Gastroenterology, Chikushino, Japan, ⁸Copenhagen University Hospital, Gastro Unit, Division of Endoscopy, Herlev, Denmark, ⁹St. Vincent Hospital, Department of Gastroenterology, Melbourne, Australia, ¹⁰University Hospital Dresden, Technical University Dresden, Medical Department 1, Dresden, Germany, ¹¹University Hospital Zurich, Departement of Gastroenterology and Hepatology, Zurich, Switzerland, ¹²Jinling Hospital, School of Medicine, Nanjing University, Department of General Surgery, Nanjing, China, ¹³Jinling Hospital, School of Medicine Nanjing University, Department of General Surgery, Nanjing, China, ¹⁴Cleveland Clinic Foundation, Department of Gastroenterology, Hepatology and Nutrition, Digestive Diseases and Surgery Institut, Cleveland, USA, ¹⁵Cleveland Clinic, Department of Pathobiology, Lerner Research Institute, Cleveland, USA

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

¹Academic Medical Center (AMC), Hospital Pharmacy, Amsterdam, The Netherlands, ²Academic Medical Center (AMC), Gastroenterology and Hepatology, Amsterdam, The Netherlands, ³AZ Delta Roeselare-Menen, Gastroenterology, Roeselare-Menen, Belgium, ⁴Erasmus University Medical Center, Gastroenterology and Hepatology, Rotterdam, The Netherlands, ⁵Radboud University Medical Center, Gastroenterology and Hepatology, Nijmegen, The Netherlands, ⁶Imelda GI Clinical Research Center, Gastroenterology, Bonheiden, Belgium, ⁷Erasme Hospital, Gastroenterology, Brussels, Belgium, ⁸Sanquin Research and Landsteiner Laboratory, Immunopathology, Amsterdam, The Netherlands, ⁹Sanquin Diagnostic Services, Biologicals Lab, Amsterdam, The Netherlands, ¹⁰University Hospitals Leuven, Gastroenterology and Hepatology, Leuven, Belgium