1. Sir Peter Mansfield Imaging Centre, School of Physics and Astronomy, University of Nottingham; Nottingham UK
2. Division of Gastrointestinal Surgery; Nottingham Digestive Diseases Centre National Institute for Health Research Biomedical Research Unit, Nottingham University Hospitals NHS Trust and the University of Nottingham, Queen's Medical Centre; Nottingham UK
3. Department of General Surgery; Harrogate District Hospital; Lancaster Park Road Harrogate N Yorks UK