1. Department of Colorectal Surgery; Royal Marsden Hospital; London UK
2. Division of Surgery; Imperial College; Chelsea and Westminster Campus; London UK
3. Centre for Pathology; Imperial College; St Mary's Hospital; London UK
4. Department of Radiology; the Royal Marsden Hospital; London UK
5. Academic Surgical Unit; Department of Biosurgery and Surgical Technology; Imperial College; St Mary's Hospital; London UK