1. Centre for Sustainable Delivery, Golden Jubilee National Hospital , Clydebank, Glasgow G81 4DN , UK
2. School of Cancer Sciences, University of Glasgow , Garscube Estate, Switchback Road, Bearsden, Glasgow G61 1QH , UK
3. Department of General Surgery, Queen Elizabeth University Hospital , Glasgow G51 4TF , UK
4. Centre for Liver & Digestive Disorders, Royal Infirmary of Edinburgh , Edinburgh EH16 4SA , UK
5. Department of General Surgery, University Hospital Wishaw , Wishaw ML2 0DP , UK
6. Department of General Surgery, Victoria Hospital , Kirkcaldy KY2 5AH , UK
7. Department of Gastroenterology, Ninewells Hospital , Dundee DD2 1SG , UK
8. Department of General Surgery, Forth Valley Royal Hospital , Larbert FK5 4WR , UK
9. Department of Gastroenterology, Borders General Hospital , Melrose TD6 9BS , UK
10. Department of Gastroenterology, Aberdeen Royal Infirmary , Aberdeen AB25 2ZN , UK
11. Department of Gastroenterology, Raigmore Hospital , Inverness IV2 3UJ , UK
12. Department of General Surgery, University Hospital Crosshouse , Kilmarnock KA2 0BE , UK
13. Department of General Surgery, Dumfries & Galloway Royal Infirmary , Dumfries DG2 8RX , UK