¹St Mark’s Academic Institute, Fistula research Unit, London, UK, ²Academic Medical Centre, Colorectal surgery, Amsterdam, The Netherlands, ³St Mark’s Academic Institute, Inflammatory Bowel Disease Research Unit, London, UK, ⁴Imperial College, Faculty of Medicine, London, UK, ⁵St Mark’s Academic Institute, Colorectal Surgery, London, UK, ⁶Imperial College, Department of Surgery and Cancer, London, UK

¹Arena Pharmaceuticals Inc., n/a, San Diego, USA, ²PAREXEL International, n/a, Waltham, USA

¹Centro Hospitalar e Universitário de Coimbra, Serviço de Gastrenterologia, Coimbra, Portugal, ²Faculdade de Medicina da Universidade de Coimbra, Gastrenterologia, Coimbra, Portugal

¹Department of Gastroenterology and Hepatology- Inserm- CIC1408, CHU Saint Etienne - Hospital Nord, Saint-Priest en Jarez, France, ²Department of Gastroenterology and Hepatology, CHU Lyon sud, Lyon, France, ³CHU Saint Etienne - Hospital Nord, Immunology, Saint-Priest en Jarez, France

¹IBD Leuven, 1Department of Gastroenterology and Hepatology, University Hospitals Leuven, Leuven, Belgium, ²Laboratory of Morphology and Molecular Pathology, University Hospitals Leuven, Leuven, Belgium

Gastroenterology, Western University, London, Canada

¹Department of Pediatric Gastroenterology, Shaare Zedek Medical Center, Jerusalem, Israel, ²Departement of Radiology, Shaare Zedek Medical Center, Jerusalem, Israel

¹Department of Gastroenterology, Sheba Medical Center, Ramat Gan, Israel, ²Department of Diagnostic Imaging, Sheba Medical Center, Ramat Gan, Israel

¹Division of Gastroenterology, University of California San Diego, La Jolla, USA, ²Gastroenterology, Mayo Clinic, Rochester, USA, ³Department of Gastroenterology and Hepatology, AZ Delta, Roeselare, Belgium, ⁴Gastroenterology, Takeda Development Center Americas Inc., Cambridge, USA, ⁵Gastroenterology, US Medical Office- Takeda Pharmaceuticals U.S.A.- Inc., Deerfield, USA

¹Gastroenterology, Flinders Medical Centre, Adelaide, Australia, ²College of Medicine and Public Health, Flinders University, Adelaide, Australia

¹Internal Medicine, Kangbuk Samsung Hospital, Seoul, Republic of Korea, ²Biomedical Systems Informatics, Yonsei University College of Medicine, Seoul, Republic of Korea, ³Biostatistics, Yonsei University, Seoul, Republic of Korea, ⁴Internal Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea

Department of Gastroenterology and Hepatology, Saitama Medical Centre- Saitama Medical University, Kawagoe City, Saitama, Japan

¹Department of Pediatric Gastroenterology- Hepatology and Nutrition, Hospital Sant Joan de Déu, Unit for the Comprehensive Care of Pediatric Inflammatory Bowel Disease, Esplugues del Llobregat, Spain, ²Pharmacy Department, Hospital Sant Joan de Déu, Esplugues del Llobregat, Spain

¹Gastroenterology, University Hospital of Heraklion, Heraklion Crete, Greece, ²Laboratory of Biology- Department of Basic Medical Science, National and Kapodistrian University of Athens, Athens, Greece

¹Gastroenterology, St Vincent’s Hospital Melbourne, Melbourne, Australia, ²Anatomical Pathology, St Vincent’s Hospital Melbourne, Melbourne, Australia

¹Institute of Psychology, University of Gdansk, Gdańsk, Poland, ²Department of Gastroenterology, Clinical Hospital of the Ministry of the Interior and Administration in Gdansk, Gdansk, Poland, ³Department of Internal Medicine and Gastroenterology with Inflammatory Bowel Disease Subdivision, Central Clinical Hospital of the Ministry of the Interior and Administration in Warsaw, Warsaw, Poland, ⁴Department of the Prevention of Alimentary Tract Diseases- Faculty of Medicine and Health Science, Jan Kochanowski University, Kielce, Poland, ⁵Division of Psychiatry, University College London, London, UK

Gastroenterology, University Hospital of Heraklion, Heraklion Crete, Greece

Department of Gastroenterology- Department of Medicine, Tokyo Women’s Medical University Hospital, Tokyo, Japan

¹Gastroenterology, Hospital Universitario La Paz, Madrid, Spain, ²Clinical Trials, Hospital Universitario La Paz, Madrid, Spain

¹Royal Gastroenterology Department, Brisbane and Women’s Hospital, Herston, Australia, ²QIMR Berghofer Medical Research Institute, Gut Health Laboratory, Herston, Australia