1. Division of Gastroenterology, Department of Internal Medicine, Providence-Providence Park Hospital, Michigan State University College of Human Medicine, Southfield
2. Division of Gastroenterology, Department of Internal Medicine, University of Michigan, Ann Arbor
3. Department of Health Behavior and Health Education, University of Michigan School of Public Health, Ann Arbor
4. Division of General Medicine, Department of Internal Medicine, University of Michigan, Ann Arbor
5. Division of General Internal Medicine, Department of Internal Medicine, University of Colorado, Aurora
6. Veterans Affairs (VA) Health Services Research and Development Service Center for Clinical Management Research, VA Ann Arbor Healthcare System, Ann Arbor, Michigan