1 Translational Gastroenterology Unit, Nuffield Department of Medicine, Oxford NIHR Biomedical Research Centre, University of Oxford, Oxford, United Kingdom; Milton Keynes University Hospital, Buckinghamshire, United Kingdom.
2 Translational Gastroenterology Unit, Nuffield Department of Medicine, Oxford NIHR Biomedical Research Centre, University of Oxford, Oxford, United Kingdom; Department of Histopathology, Changi General Hospital, Singapore.
3 Translational Gastroenterology Unit, Nuffield Department of Medicine, Oxford NIHR Biomedical Research Centre, University of Oxford, Oxford, United Kingdom.