1. National Bowel Research Centre and GI Physiology Unit Blizard Institute Centre for Neuroscience, Surgery & Trauma Queen Mary University of London London UK
2. Pragmatic Clinical Trials Unit Centre for Primary Care and Public Health Queen Mary University of London London UK
3. Institute of Applied Clinical Science University of Keele Keele UK
4. Department of Gastroenterology University Hospitals of North Midlands Stoke on Trent UK