1. Department of Clinical Nutrition; St James's Hospital; Dublin Ireland
2. Department of Nutrition and Dietetics; The Royal Marsden NHS Foundation Trust; London UK
3. The GI Unit; Department of Medicine; The Royal Marsden NHS Foundation Trust; London UK
4. Research Data and Statistics Unit; Department of Research and Development; The Royal Marsden NHS Foundation Trust; Sutton UK
5. Department of Gastroenterology; Lincoln County Hospital; United Lincolnshire Hospitals; Lincoln UK
6. Diabetes and Nutritional Sciences Division; King's College London; London UK