1. Department of Gastroenterology; Royal Liverpool University Hospital; Liverpool UK
2. Department of Molecular and Clinical Cancer Medicine; University of Liverpool; Liverpool UK
3. Department of Gastroenterology; Salford Royal Hospitals NHS Foundation Trust; Salford UK
4. Department of Gastroenterology; Manchester Royal Infirmary; Manchester UK
5. Department of Gastroenterology; University Hospital of South Manchester; Manchester UK
6. Digestive Diseases Centre; University Hospital Aintree; Liverpool UK
7. Department of Surgery; Salford Royal Hospitals NHS Foundation Trust; Salford UK