1. Gastroenterology, School of Medicine, University of Nottingham, Nottingham, UK
2. Queens Medical Centre, Department of Histopathology, Nottingham University Hospitals NHS trust, Nottingham, UK
3. Queens Medical Centre, Gastrointestinal Department, Nottingham University Hospitals NHS trust, Nottingham, UK
4. Queens Medical Centre, Nottingham Colorectal Service, QMC Campus, Nottingham University Hospitals NHS Trust, Nottingham, UK
5. Queens Medical Centre, Gastroenterology, NIHR Nottingham Digestive Diseases Biomedical Research Unit, Nottingham University Hospitals NHS Trust, Nottingham, UK