¹Amsterdam UMC, Gastroenterology and Hepatology, Amsterdam, The Netherlands, ²MUMC+, Gastroenterology and Hepatology, Maastricht, The Netherlands, ³University of Warwick, School of Engineering, Coventry, UK, ⁴Spaarne Gasthuis, Gastroenterology and Hepatology, Hoofddorp, The Netherlands, ⁵OLVG West, Gastroenterology and Hepatology, Amsterdam, The Netherlands, ⁶Amsterdam UMC, Pediatric gastroenterology, Amsterdam, The Netherlands

¹Kyungpook National University, School of Medicine, Internal Medicine, Daegu, South Korea, ²Keimyung University, School of Medicine, Internal Medicine, Daegu, South Korea, ³Catholic University of Daegu, School of Medicine, Internal Medicine, Daegu, South Korea, ⁴Yeungnam University College of Medicine, Internal Medicine, Daegu, South Korea, ⁵Dongguk University School of Medicine, Internal Medicine, Gyeongju, South Korea

¹Universitá della Campania, Colorectal Surgery, Department of Medical, Surgical, Neurological, Metabolic and Ageing Sciences, Naples, Italy, ²Università della Campania Luigi Vanvitelli, Section of Statistic, Department of Mental Health and Public Medicine, Naples, Italy, ³Royal Marsden Hospital and Imperial College London, Unit of Colorectal Surgery, Royal Marsden Hospital, London, UK

¹Queen Silvia′s Children Hospital, Gothenburg, Sweden, ²Institute of Clinical Sciences, The Sahlgrenska Academy at University of Gothenburg, Department of pediatrics, Gothenburg, Sweden, ³Premier Research LLC, Durham/NC, USA, ⁴Institute of Medicine, The Sahlgrenska Academy at University of Gothenburg, Centre for Bone and Arthritis Research, Department of Internal Medicine and Clinical Nutrition, Gothenburg, Sweden, ⁵Clinical and Molecular Osteoporosis Research Unit, Department of Clinical Sciences and Orthopedics, University of Lund, Malmö, Sweden, ⁶Institute of Medicine, The Sahlgrenska Academy at University of Gothenburg, Geriatric Medicine, Department of Internal Medicine and Clinical Nutrition, Gothenburg, Sweden, ⁷Sahlgrenska University Hospital, Geriatric Medicine, Gothenburg, Sweden

¹Université de Lorraine, Vandœuvre-lès-Nancy (Nancy University Hospital, Lorraine University), Nancy, France, ²University of Western Ontario, London, Canada, ³Mayo Clinic, Phoenix, USA, ⁴Genentech, South San Francisco, USA, ⁵Roche, Burgess Hill, UK, ⁶University of Chicago Medicine, Chicago, USA

¹Clinical Hospital Centre Zagreb, Department of Gastroenterology and Hepatology, Zagreb, Croatia, ²Nordic Bioscience A/S, Biomarkers and Research, Herlev, Denmark, ³Unit of Clinical Nutrition, University Hospital Zagreb, Zagreb, Croatia, ⁴University of Zagreb, School of Medicine, Zagreb, Croatia

¹Erasmus MC, Department of Gastroenterology and Hepatology, Rotterdam, The Netherlands, ²Erasmus MC, Department of Public Health, Rotterdam, The Netherlands, ³Leiden UMC, Department of Clinical Biostatistics and Medical Decision Making, Leiden, The Netherlands, ⁴Madrid Hospital Universitario de la Princesa, Instituto de Investigación Sanitaria Princesa (IIS-IP) and Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBEREHD), Department of Gastroenterology, Madrid, Spain, ⁵Royal Hallamshire Hospital, Sheffield Teaching Hospitals NHS Foundation Trust, Department of Gastroenterology and Hepatology, Sheffield, UK, ⁶Western General Hospital, Department of Gastroenterology and Hepatology, Edinburgh, UK, ⁷University of Szeged, Department of Medicine, Szeged, Hungary, ⁸Centre Hospitalier Universitaire de Liège, Department of Gastroenterology and Hepatology, Liège, Belgium, ⁹INSERM U717, Department of Biostatistics and Clinical Epidemiology, Paris, France, ¹⁰IBD Clinical and Research Centre, Iscare a.s, Prague, Czech Republic, ¹¹Institute of Medical Biochemistry and Laboratory Diagnostics, 1st Medical Faculty and General Teaching Hospital, Prague, Czech Republic, ¹²Amsterdam UMC, Academic Medical Centre, Department of Gastroenterology and Hepatology, Amsterdam, The Netherlands

¹Graduate School of Medicine, Kyoto University, Department of Gastroenterology and Hepatology, Kyoto, Japan

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

¹Division of Gastroenterology and Hepatology, Keio University, Tokyo, Japan, ²Center for Advanced IBD Research and Treatment, Kitasato University Kitasato Institute Hospital, Tokyo, Japan

¹Hospital da Senhora da Oliveira, Gastroenterology, Guimarães, Portugal, ²Life and Health Sciences Research Institute, School of Medicine, University of Minho, Braga/Guimarães, Portugal, ³ICVS/3B’s, PT Government Associate Laboratory, Braga/Guimarães, Portugal

¹Mount Sinai, New York, USA, ²Pfizer Inc., New York, USA, ³Pfizer Inc., Patient and Health Impact, New York, USA, ⁴Pfizer Inc., Groton, USA, ⁵Pfizer Inc., Collegeville, USA, ⁶Fondazione Policlinico Gemelli IRCCS – Università Cattolica del Sacro Cuore, Rome, Italy

¹University of Rome 'Tor Vergata', Gastroenterology, Rome, Italy, ²University or Rome 'Tor Vergata', Anatomopathology, Rome, Italy

¹Whipps Cross Hospital, Barts Health NHS Trust, London, UK

¹Instituto Português de Oncologia de Lisboa Francisco Gentil, Gastroenterology, Lisbon, Portugal

¹All India Institute Of Medical Sciences, New Delhi, India

¹Hospital Vall d'Hebron, Colorectal surgery, Barcelona, Spain

¹University Hospital ‘Tsaritsa Yoanna – ISUL’, Gastroenterology Clinic, Sofia, Bulgaria, ²University of National and World Economy, Department of Statistics and Econometrics, Sofia, Bulgaria, ³University Hospital ‘Tsaritsa Yoanna – ISUL’, Microbiology and Virology Department, Sofia, Bulgaria

¹McGill University Health Center, Department of Medicine, Montreal, Canada, ²McGill University Health Center, Division of Gastroenterology, Montreal, Canada, ³Semmelweis University, First Department of Internal Medicine, Budapest, Hungary

¹Medical University of Vienna, Department of Internal Medicine III, Vienna, Austria, ²Unidata Geodesign, Vienna, Austria, ³Medical University of Vienna, Department of Epidemiology, Center of Public Health, Vienna, Austria