¹St Mark's Hospital, IBD Department, London, UK

¹St Vincent's Hospital, Gastroenterology, Melbourne, Australia, ²University of Melbourne, Melbourne, Australia

¹University of Pisa, Department of new technologies and translational sciences in medicine and surgery, Pisa, Italy, ²University of Genoa, Department of Internal Medicine, Gastroenterology Unit, Genoa, Italy, ³Pisa University Hospital, Department of General Surgery and Gastroenterology, Pisa, Italy

¹IBD Unit, Hull and East Yorkshire Hospitals NHS Trust, Hull, UK, ²IBD Unit, Presidio Columbus, Fondazione Policlinico Universitario A. Gemelli IRCCS, Italy, Rome, Italy, ³Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK, ⁴Erasmus Medical Centre, Rotterdam, The Netherlands, ⁵School of health sciences and University Hospital of Ioannina, Ioannina, Greece, ⁶IBD Unit, Rzeszow University, Rzeszow, Poland, ⁷Venizeleio General Hospital, Crete, Greece, ⁸Hull York Medical School, University of Hull and York, Hull, UK

¹Centro Hospitalar Lisboa Central EPE, Gastroenterology, Lisboa, Portugal, ²Centro Hospitalar Lisboa Central, Lisboa, Portugal

¹Inflammatory Bowel Disease Center, University of Chicago Medicine, Chicago, USA, ²Litmus Health, Inc., Austin, TX, USA

¹Univeristy of Calgary, Inflammatory Bowel Disease Unit, Calgary, Canada, ²University of Calgary, Community Health Sciences, Calgary, Canada, ³University of Calgary, Pediatric Gastroenterology, Calgary, Canada, ⁴University of British Columbia, Inflammatory Bowel Disease Unit, Vancouver, Canada

¹Tallaght University Hospital, Department of Gastroenterology, Dublin 24, Ireland, ²Trinity College Dublin, School of Medicine, Dublin 2, Ireland

¹Juntendo University School of Medicine, Department of Gastroenterology, Tokyo, Japan, ²Juntendo University Urayasu Hospital, Department of Gastroenterology, Urayasu, Japan

¹Great Ormond Street Hospital, Gastroenterology, London, UK

¹Severance Children's Hospital, Department of pediatrics, Seoul, South Korea

¹P D Hinduja Hospital, Biochemistry, Mumbai, India, ²P D Hinduja Hospital, Gastroenterology, Mumbai, India, ³Projection Research, Phoenixville, PA. 19460, USA

¹Royal Liverpool University Hospital, Gastroenterology, Liverpool, UK, ²Aintree University Hospital, Gastroenterology, Liverpool, UK, ³Arrowe Park Hospital, Gastroenterology, Upton, UK, ⁴Countess of Chester Hospital, Gastroenterology, Chester, UK

¹Inselspital / University hospital Bern, Bern, Switzerland

¹University of Cambridge, Department of Medicine, Cambridge, UK, ²Addenbrooke's Hospital, Pharmacy, Cambridge, UK

¹University of Leuven, Department of Pharmaceutical and Pharmacological Sciences, Leuven, Belgium, ²University Medical Centre Ljubljana, Department of Gastroenterology and Hepatology, Ljubljana, Slovenia, ³University Hospitals Leuven, Department of Gastroenterology and Hepatology, Leuven, Belgium, ⁴University of Leuven, Department of Chronic Diseases, Metabolism and Ageing, Leuven, Belgium

¹University of North Carolina, Medicine, Chapel Hill, USA, ²OpenBiome, Somerville, MA, USA, ³Finch, Somerville, MA, USA

¹Leiden University Medical Center, Gastroenterology and Hepatology, Leiden, The Netherlands, ²Leiden University Medical Center, Dietetics, Leiden, The Netherlands, ³Voeding Leeft, Amsterdam, The Netherlands

¹Amsterdam UMC, Department of Surgery, Amsterdam, The Netherlands, ²Amsterdam UMC, Department of Gastroenterology and Hepatology, Amsterdam, The Netherlands

¹Medical University of Graz, Graz, Austria, ²Barmherzige Brüder St. Veit/Glan, St. Veit, Austria