1. Department of Surgery, North Tyneside General Hospital, North Shields, UK
2. Department of Surgery, Wansbeck General Hospital, Ashington, UK
3. James Cook University Hospital, Middlesbrough, UK
4. Northern Region Colorectal Cancer Audit Group, Centre for Life, Institute of Human Genetics, Newcastle upon Tyne, UK
5. Wolfson Research Institute, Durham University, Stockton on Tees, UK