1. Clinical and Translational Epidemiology Unit and Division of Gastroenterology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts
2. Department of Epidemiology and Population Health, Albert Einstein College of Medicine, New York, New York
3. Departments of Epidemiology and Nutrition, Harvard T.H. Chan School of Public Health, Boston, Massachusetts
4. Division of Gastroenterology, University of Washington School of Medicine, Seattle, Washington