Affiliation: | 1. Division of Gastroenterology and Hepatology, Department of Medicine, Stanford University, California;2. Division of Gastroenterology and Hepatology, Department of Medicine, University of Pennsylvania, Pennsylvania;3. Division of Gastroenterology and Hepatology, Department of Medicine, Hennepin County Medical Center, Minnesota;4. Division of Gastroenterology and Hepatology, Department of Medicine, University of Minnesota, Minnesota;5. Division of Gastroenterology and Hepatology, Department of Medicine, Beth Israel Deaconess Medical Center, Massachusetts;6. Division of Gastroenterology and Hepatology, Department of Medicine, Duke University, North Carolina |