1. Division of Gastroenterology, Massachusetts General Hospital, 55 Fruit Street, Boston, MA 02114, USA
2. Clinical and Translational Epidemiology Unit, Massachusetts General Hospital, 55 Fruit Street, Boston, MA 02114, USA
3. Harvard Medical School, 25 Shattuck Street, Boston, MA 02115, USA
4. Division of Gastroenterology, University of Kentucky Albert B. Chandler Hospital, 800 Rose Street, Lexington, KY 40536, USA
5. Cardiovascular Research Center, Massachusetts General Hospital, 55 Fruit Street, Boston, MA 02114, USA
6. Corrigan Minehan Heart Center, Massachusetts General Hospital, 55 Fruit Street, Boston, MA 02114, USA
7. Cardiology Division, Massachusetts General Hospital, 55 Fruit Street, Boston, MA 02114, USA
8. Department of Medicine, Massachusetts General Hospital, 55 Fruit Street, Boston, MA 02114, USA
9. General Internal Medicine, Department of Medicine, Boston University School of Medicine, 72 E Concord Street, Boston, MA 02118, USA
10. The Framingham Heart Study, 73 Mt Wayte Avenue, Framingham, MA 01702, USA
11. Department of Cardiology, University Medical Centre Groningen, Hanzeplein 1, 9713 GZ, Groningen, The Netherlands
12. Population Sciences Branch, Division of Intramural Research, National Heart, Lung, and Blood Institute, National Institutes of Health, 9000 Rockville Pike, Bethesda, MD 20892, USA
13. Department of Biostatistics, Boston University School of Public Health, 715 Albany Street, Boston, MA 02118, USA