Affiliation: | 1. Department of Bio-statistics, Division of Gastroenterology, Hepatology and Nutrition, Virginia Commonwealth University and McGuire VA Medical Center, Richmond, Virginia;3. Department of Medicine, Dallas VA Medical Center, Dallas, Texas;4. Department of Medicine, University of Alberta, Edmonton, Canada;5. Department of Medicine, Mayo Clinic, Rochester, New York;7. Department of Medicine, Yale University, New Haven, Connecticut;12. Department of Medicine, University of California, San Francisco, California;8. Department of Medicine, University of Arizona, Phoenix, Arizona;9. Department of Medicine, Mayo Clinic, Phoenix, Arizona;71. Department of Medicine, Emory University, Atlanta, Georgia;123. Department of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania |