Affiliation: | 1. Division of Gastroenterology and Hepatology, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania;2. Gastroenterology Section, Corporal Michael J. Crescenz VA Medical Center, Philadelphia, Pennsylvania;3. Leonard Davis Institute of Health Economics, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania;4. Department of Biostatistics, Epidemiology, and Informatics, University of Pennsylvania, Philadelphia, Pennsylvania;5. Division of Digestive Health and Liver Diseases, University of Miami Miller School of Medicine, Miami, Florida;6. Division of Digestive Diseases, Yale University School of Medicine, New Haven, Connecticut;7. VA Connecticut Healthcare System, West Haven, Connecticut |