1. Functional Gut Clinic; London UK
2. Centre for Digestive Diseases; Blizard Institute of Cell & Molecular Science; Wingate Institute of Neurogastroenterology; Barts and the London School of Medicine & Dentistry; Queen Mary University of London; London UK
3. Department of Gastroenterology; University Hospitals of North Midlands; Stoke on Trent Staffordshire UK
4. GlaxoSmithKline Research & Development Ltd; Cambridge UK
5. GlaxoSmithKline; Research Triangle Park NC USA