Affiliation: | 1. Department of Histopathology, Nottingham University Hospitals, University of Nottingham, Nottingham Digestive Diseases BRU, Nottingham, UK;2. Department of Histopathology, Royal Derby Hospitals, Derby, UK;3. Department of Histopathology, Sherwood Forest Hospitals, Mansfield, UK;4. Department of Histopathology, University Hospitals of Leicester, Leicester, UK |