1. Department of Medicine; Norwich Medical School University of East Anglia; Norwich UK
2. Norfolk & Norwich University Hospitals NHS Trust; Norwich UK
3. Strangeways Research Laboratory; Institute of Public Health; University of Cambridge; Cambridge UK
4. Institute of Cancer Epidemiology; Danish Cancer Society; Copenhagen Denmark
5. Division of Clinical Epidemiology; DKFZ-German Cancer Research Centre; Heidelberg Germany
6. Department of Clinical Sciences; University Hospital; Malmö Sweden
7. Department of Epidemiology; German Institute of Human Nutrition; Potsdam Germany
8. Department of Public Health and Clinical Medicine; Nutritional Research; Umeå University; Umeå Sweden
9. Department of Public Health and Clinical Medicine; GI unit; Umeå University; Umeå Sweden
10. Section for Epidemiology; Department of Public Health; Aarhus University; Aarhus Denmark
11. Department of Cardiology; Aalborg University Hospital; Aalborg Denmark
12. Department of Gastroenterology and Hepatology; University Medical Center Utrecht; Utrecht The Netherlands
13. National Institute of Public Health and the Environment (RIVM); Bilthoven The Netherlands
14. The School of Public Health; Imperial College London; London UK
15. Division of Epidemiology; Imperial College London; London UK