¹Istanbul University Cerrahpasa Medical School, Gastroenterology, Istanbul, Turkey, ²Bezmialem University School of Medicine, Gastroenterology, Istanbul, Turkey

Charles Nicolle Hospital, Gastroenterology, Tunis, Tunisia

¹Evidera, Hammersmith, United Kingdom, ²Evidera, Bethesda, United States, ³Evidera, Lexington, United States, ⁴Takeda, London, United Kingdom

¹University of Rome Tor Vergata, Gastroenterology Unit, Department of Systems Medicine, Rome, Italy, ²Department of Internal Medicine and Gastroenterology Staedtisches Klinikum, Luneburg, Germany, ³Ambulanzzentrum Gastroenterologie am Klinikum, Luneburg, Germany, ⁴Department of Clinical Sciences, L. Sacco University Hospital, Milan, Italy, ⁵University Hospital Erlangen, Erlangen, Germany, ⁶Division of Gastroenterology, Department of Medicine, University of Calgary,, Calgary, Canada, ⁷Gastroenterology Unit, Department of Systems Medicine, University of Rome “Tor Vergata”, Rome, Italy, ⁸Division of Gastroenterology, Department of Medicine, University of Calgary, Calgary, Canada, ⁹Division of Gastroenterology and Hepatology, Mayo Clinic College of Medicine, Rochester, Minnesota, United States, ¹⁰Department of Gastroenterology and Hepatology, Tokyo Medical and Dental University, Tokyo, Japan, ¹¹Northwestern University Feinberg School of Medicine, Digestive Disease Centre, Chicago, Illinois, United States

¹St Mark’s Hospital, Colorectal Surgery & IBD Unit, London, United Kingdom, ²Imperial College London, Surgery and Cancer, London, United Kingdom, ³Torbay Hospital, Gastroenterology, Torbay, United Kingdom, ⁴AMC, Surgery, Amsterdam, Netherlands

¹University of Otago, Paediatrics/Gastroenterology, Christchurch, New Zealand, ²University of Otago, Paediatrics, Christchurch, New Zealand, ³University of Otago, Gastroenterology, Christchurch, New Zealand

¹Université Rennes 1 & CHU Pontchaillou Rennes, Service des Maladies de l’Appareil Digestif, Rennes, France, ²Université Rennes 1 & CHU Pontchaillou Rennes, Service de chirurgie digestive, Rennes, France, ³CHU Pontchaillou, Service de Santé Publique, Rennes, France, ⁴ORSB, Rennes, France, ⁵CHU Brest, La Cavale Blanche, Service des Maladies de l’Appareil Digestif, Brest, France

¹Hôpital Saint-Antoine AP-HP, Department of Gastroenterology and Nutrition, Paris, France, ²Hôpital Charles-Lemoyne, Université de Sherbrooke, Department of Gastroenterology et Hepatology, Montréal, Canada

¹Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, South Korea, ²Kangbuk Samsung Hospital, Seoul, South Korea, ³Hanyang University Guri Hospital, Guri, South Korea, ⁴Konyang University, Daejeon, South Korea, ⁵Kyung Hee University, Seoul, South Korea, ⁶Dankook University, Chonan, South Korea, ⁷Dongguk University, Goyang, South Korea, ⁸Inje University, Seoul, South Korea, ⁹Soonchunhyang University, Chonan, South Korea, ¹⁰Ewha Woman’s University, Seoul, South Korea, ¹¹Jeju National University, Jeju, South Korea, ¹²Hallym University, Seoul, South Korea

¹Chaim Sheba Medical Centre, Gastroenterology, Ramat Gan, Israel, ²Sheba Medical Centre, Gastroenterology, Tel Hashomer, Israel, ³Sheba Medical Centre, Department of Diagnostic Imaging, Tel Hashomer, Israel, ⁴Edmond and Lily Safra Children’s Hospital, Gastroenterology, Tel Hashomer, Israel, ⁵Tel Aviv Medical Centre, IBD Centre, Department of Gastroenterology and Liver Diseases, Tel Aviv, Israel, ⁶Rambam Health Care Campus, Haifa, Israel; Bruce & Ruth Rappaport School of Medicine, Technion Israel Institute of Technology, Gastroenterology, Haifa, Israel

¹IBD Section - Hospital Bonorino Udaondo, Medicine, Buenos Aires, Argentina, ²Hospital Bonorino Udaondo, Pathology Department, Buenos Aires, Argentina

¹University of Duisburg-Essen, Integrative Gastroenterology, Kliniken Essen-Mitte, Essen, Germany, ²Tech Lab Inc, Blacksburg, United States, ³Labor L+S, Enterosan, Bad Bocklet-Grossenbrach, Germany, ⁴University of Duisburg-Essen, Integrative and Internal Medicine, Essen, Germany, ⁵University of Duisburg-Essen, Department of Diagnostic and Interventional Radiology and Neuroradiology, University Hospital Essen, Essen, Germany, ⁶University Duisburg-Essen, Department of Diagnostic and Interventional Radiology and Neuroradiology, Essen, Germany

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 Hospital G. Montpied, Biochemistry laboratory, Clermont-Ferrand, France, ⁴GM – Clermont-Ferrand University and Medical Centre, Biostatistics Unit, Clermont-Ferrand, France

¹Academic Medical Centre (AMC), Radiology, Amsterdam, Netherlands, ²OLVG, Radiology, Amsterdam, Netherlands, ³Academic Medical Centre (AMC), Gastroenterology, Amsterdam, Netherlands

Kyoto Prefectural University of Medicine, Molecular Gastroenterology and Hepatology, Kyoto, Japan

¹Jagiellonian University Medical College, Department of Integrated Dentistry, Kraków, Poland, ²Jagiellonian University Medical College, Department of Gastroenterology and Hepatology, Kraków, Poland, ³University of Duisburg-Essen, Department of Gynaecology and Obstetrics, Essen, Germany, ⁴Jagiellonian University Medical College, Department of Food Chemistry and Nutrition, Kraków, Poland

Sapienza University, Paediatric Gastroenterology and Liver Unit, Rome, Italy

¹Hvidovre University Hospital, Dept. of Medical Gastroenterology, Hvidovre, Denmark, ²Køge University Hospital, Medical Department, Køge-4600, Denmark, ³Hvidovre University Hospital, Clinical Physiology and Nuclear Medicine, Hvidovre, Denmark, ⁴Køge University Hospital, Clinical Biochemistry, Køge, Denmark, ⁵Sorbonne University - UPMC, Clinical Biochemistry, Paris, France, ⁶Gentofte University Hospital, Research Unit, Gentofte, Denmark, ⁷Køge University Hospital, Medical Department, Køge, Denmark, ⁸University of Copenhagen, Department of Medical Physiology, Copenhagen, Denmark

¹Hospital Universitario de La Princesa, IIS-IP and CIBERehd, Gastroenterology Unit, Madrid, Spain, ²Hospital Universitario de Fuenlabrada, Gastroenterology Unit, Madrid, Spain, ³Hospital de Donostia, Instituto Biodonostia, UPV/EHU and CIBEREHD, Gastroenterology Unit, Guipuzcoa, Spain, ⁴Hospital Galdakao, Gastroenterology Unit, Vizcaya, Spain, ⁵Hospital Clínico Universitario San Carlos and IdISSC, Gastroenterology Unit, Madrid, Spain, ⁶Hospital Gregorio Marañón and IiSGM, Gastroenterology Unit, Madrid, Spain

University of Oulu and Northern Finland Laboratory Centre Nordlab, Oulu, Finland