1. Neurogastroenterology Group; Blizard Institute of Cell & Molecular Science; Wingate Institute of Neurogastroenterology; Barts & the London School of Medicine & Dentistry; Queen Mary University of London; London UK
2. Blackpool Victoria Hospital; Blackpool UK
3. Leeds Gastroenterology Institute; St. James's University Hospital; Leeds UK
4. Leeds Institute of Biomedical and Clinical Sciences; Leeds University; Leeds UK
5. Department of Gastroenterology; University Hospitals of the North Midlands; Stoke on Trent UK