Affiliation: | 1. Division of Gastroenterology and Hepatology, University of Michigan, Ann Arbor, Michigan;3. Gastroenterology Section, VA Ann Arbor Healthcare System, Ann Arbor, Michigan;4. Center for Clinical Management Research, VA Ann Arbor Healthcare System, Ann Arbor, Michigan;5. Michigan Integrated Center for Health Analytics and Medical Prediction, University of Michigan, Ann Arbor, Michigan |