1 Department of Gastroenterology, The Pennine Acute Hospitals NHS Trust, Manchester, United Kingdom.
2 Department of Gastroenterology, Barnet and Chase Farm Hospitals NHS Trust, London, UK.
3 Division of Gastroenterology, University of British Columbia, Vancouver, Canada.
4 Department of Gastroenterology, King's College Hospital NHS Foundation Trust, London, UK; Department of Gastroenterology, Kings's College London, London, UK.
5 Department of Gastroenterology, University Hospitals Birmingham NHS Foundation Trust, Birmingham, UK; Department of Gastroenterology, Institute of Translational Medicine, University of Birmingham, Birmingham, UK.
6 Inflammatory Bowel Disease Center, Division of Gastroenterology and Hepatology, Department of Medicine, Mayo Clinic, Jacksonville, Florida, USA.
7 Department of Gastroenterology, The Pennine Acute Hospitals NHS Trust, Manchester, UK; Manchester Academic Health Sciences, University of Manchester, Manchester, UK.