1. The Wingate Institute for Neurogastroenterology and GI Physiology Unit; Centre for Neuroscience and Trauma; Blizard Institute; Barts and The London School of Medicine and Dentistry; Queen Mary University of London; London UK
2. Diabetes and Nutritional Sciences Division; Faculty of Life Sciences and Medicine; King's College London; London UK
3. Centre for Gastroenterology and Clinical Nutrition; University College London; London UK
4. University Hospitals of North Midlands; Stoke on Trent UK