Affiliation: | 1. Division of Gastroenterology and Hepatology, Department of Medicine, Stanford University, Stanford, California;3. Department of Management Sciences and Engineering, Stanford University, Stanford, California;4. Stanford Health Policy and Department of Medicine, Stanford University, Stanford, California;6. Stanford University School of Medicine, Stanford, California;5. Division of General Medical Disciplines, Department of Medicine, Stanford University, Stanford, California;7. Department of Veterans Affairs Medical Center, University of California, San Francisco, San Francisco, California |