1. From the Translational Gastroenterology Unit and Kennedy Institute, National Institute for Health and Care Research Oxford Biomedical Research Centre, University of Oxford, Oxford (S.T.), and the Inflammatory Bowel Disease Unit, St. Mark’s Hospital and Imperial College London, London (A.H.) — both in the United Kingdom; the Division of Gastroenterology, Department of Medicine, Mount Sinai Hospital, University of Toronto, Toronto (M.S.S.), the Department of Medicine, Division of Gastroenterology, Western...