¹St Mark's Hospital, Colorectal Surgery, London, UK, ²St Mark's Hospital, Gastrointestinal Imaging, London, UK, ³St Mark's Hospital, IBD/Physiology, London, UK

¹St Mark's hospital and Academic institute, Cancer and Surgery, London, UK, ²Northwest Thames Regional Genetic Service, London, UK

¹Mater Dei Hospital, Msida, Malta, ²Medical School and University Hospital of Ioannina, Department of Gastroenterology and Hepatology, Ioannina, Greece, ³Venizeleio General Hospital, Department of Gastroenterology, Crete, Greece, ⁴Evangelismos Hospital, Department of Gastroenterology, Athens, Greece, ⁵Sheba Medical Center, Department of Gastroenterology, Tel Hashomer, Israel, ⁶University Hospital Heraklion, Department of Gastroenterology, Crete, Greece, ⁷University of Szeged, First Department of Internal Medicine, Szeged, Hungary

¹Clinical Hospital Dubrava, Department of Gastroenterology and Hepatology and Clinical nutrition, Zagreb, Croatia, ²University Hospital Dubrava, Department for Diagnostic and Interventional Radiology, Zagreb, Croatia, ³University Hospital Dubrava, Department of Gastroenterology and Hepatology and Clinical Nutrition, Zagreb, Croatia

¹Hospital Universitario de Bellvitge, Gastroenterology, L´Hospitalet de Llobregat, Spain, ²Hospital Universitario de Bellvitge, Pharmacy, L´Hospitalet de LLobregat, Spain, ³Universitat de Barcelona, Pharmacy and pharmaceutical technology, Barcelona, Spain, ⁴Hospital Universitario de Bellvitge, Immunology, L´Hospitalet de LLobregat, Spain

¹Queen Elizabeth Hospital, Medicine, Hong Kong, Hong Kong, ²St Mark's Academic Institute, IBD Unit, Harrow, UK, ³The Chinese University of Hong Kong, Medicine and Therapeutics, Hong Kong, Hong Kong

¹Hospital Alvaro Cunqueiro, Complexo Hospitalario Universitario de Vigo, Instituto de Investigación Biomédica Galicia Sur, Estrutura Organizativa de Xestión Integrada de Vigo, Gastroenterology, Vigo, Spain, ²Hospital Meixoeiro, Complexo Hospitalario Universitario de Vigo, Instituto de Investigación Biomédica, Galicia Sur, Estrutura Organizativa de Xestión Integrada de Vigo, Laboratory, Vigo, Spain, ³Hospital Alvaro Cunqueiro, Complexo Hospitalario Universitario de Vigo, Instituto de Investigación Biomédica, Pathology, Vigo, Spain

¹Nabeul-Tunisia, Department of Gastroenterology Nabeul-Tunisia, Nabeul, Tunisia, ²Nabeul-Tunisia, Nabeul-Tunisia, Nabeul, Tunisia, ³Mohamed Taher Maamouri Hospital, Department of Gastroenterology, Nabeul, Tunisia

“Dana-Dwek” Children's Hospital, affiliated to the Sackler Faculty of Medicine, Tel Aviv University, The Pediatric Gastroenterology Unit, Tel Aviv, Israel

¹"Dana-Dwek" Children's Hospital, affiliated to the Sackler Faculty of Medicine, Tel Aviv University, The Pediatric Gastroenterology unit, Tel Aviv, Israel, ²Hematology Laboratories, Tel Aviv Medical Center, Tel Aviv, Israel, ³Hematology Laboratories Tel Aviv Sourasky Medical Center, Tel Aviv, Israel, ⁴Dana Dwek Children's Hospital, Pediatric department, Tel Aviv, Israel

¹Kyushu University, Medicine and Clinical Science, Fukuoka, Japan, ²Iwate Medical University, Internal Medicine, Morioka, Japan, ³Toho University, Sakura Medical Centre, Internal Medicine, Chiba, Japan

¹Sant'Orsola – Malpighi Hospital, Alma Mater Studiorum University of Bologna, Surgery of the Alimentary Tract, Department of Medical and Surgical Sciences, Bologna, Italy, ²Sant'Orsola – Malpighi Hospital, Alma Mater Studiorum University of Bologna, IBD Unit, Department of Medical and Surgical Sciences, Bologna, Italy

¹Concord Repatriation General Hospital, Department of Gastroenterology, Sydney, Australia, ²Singapore General Hospital, Gastroenterology, Singapore, Singapore, ³Institute of Digestive Disease, The Chinese University of Hong Kong, Department of Medicine, Hong Kong, Hong Kong, ⁴Royal Free Hospital, London, UK

Hospital Universitari Vall Hebron, Barcelona, Spain, Barcelona, Spain

¹QIMR Berghofer Medical Research Institute, Inflammatory Bowel Diseases Research Group, Herston, Australia, ²St. Vincent's Hospital Melbourne, Department of Gastroenterology and Hepatology, Melbourne, Australia, ³St. Vincent's Hospital Sydney, Department of Gastroenterology and Hepatology, Sydney, Australia, ⁴Mater Hospital, Department of Gastroenterology, Brisbane, Australia, ⁵Stratos Technology Partners, Christchurch, New Zealand, ⁶Royal Adelaide Hospital, Department of Gastroenterology and Hepatology, Adelaide, Australia, ⁷Liverpool Hospital, Department of Gastroenterology and Hepatology, Sydney, Australia, ⁸Royal Brisbane and Women’s Hospital, Department of Gastroenterology and Hepatology, Brisbane, Australia, ⁹University of Queensland, School of Medicine, Brisbane, Australia, ¹⁰University of Adelaide, School of Medicine, Adelaide, Australia

¹St.Vincent's University Hospital, Gastroenterology, Dublin, Ireland, ²St.Vincent's University Hospital, Center for Colorectal Disease, Dublin, Ireland, ³University College Dublin, School of Medicine, Dublin, Ireland, ⁴St Vincent's University Hospital, Centre for Colorectal Disease, Dublin, Ireland

¹UZ Leuven, Gastroenterology and Hepatology, Leuven, Belgium, ²UZ Leuven, Information Technology, Leuven, Belgium

¹Yokohama City University Medical Centre, Inflammatory Bowel Disease Centre, Yokohama, Japan, ²Yokohama City University Medical Centre, Department of Laboratory Medicine and Clinical Investigation, Yokohama, Japan, ³Yokohama City University, Department of Biostatistics, Yokohama, Japan, ⁴Yokohama City University Graduate School of Medicine, Department of Gastroenterology, Yokohama, Japan

¹Sapienza - University of Rome, Department of Pediatrics, Pediatric Gastroenterology and Liver Unit, Rome, Italy, ²Children's Center for Digestive Health Care, Atlanta, USA, ³Sapienza – University of Rome, Department of Radiological Sciences, Oncology, and Pathology, Rome, Italy, ⁴Nuovo Regina Margherita Hospital, Gastroenterology Department, Rome, Italy, ⁵Sapienza – University of Rome, Department of Pediatrics PICU, Rome, Italy

¹Kyung Hee University School of Medicine, Seoul, South Korea, ²Sungkyunkwan University School of Medicine, Seoul, South Korea, ³Seoul National University College of Medicine, Seoul, South Korea, ⁴University of Ulsan College of Medicine, Asan Medical Center, Seoul, South Korea, ⁵Ewha Womans University School of Medicine, Seoul, South Korea, ⁶St. Vincent’s Hospital, The Catholic University of Korea, Seoul, South Korea, ⁷Department of Internal Medicine Kangbuk Samsung Hospital Sungkyunkwan University, Seoul, South Korea, ⁸Korea University College of Medicine, Seoul, South Korea, ⁹Eulji University College of Medicine, Seoul, South Korea, ¹⁰Yonsei University College of Medicine, Seoul, South Korea, ¹¹Medical affairs, Janssen Korea, Seoul, South Korea