1. Department of Internal Medicine, University of Michigan Medical School, Ann Arbor2Patient Safety Enhancement Program, VA Ann Arbor Health Care System, Ann Arbor, Michigan3Center for Clinical Management Research, VA Ann Arbor Health Care System, Ann Arbor,
2. Department of Internal Medicine, Beaumont Hospital, Dearborn, Michigan
3. Department of Internal Medicine, Integrated Healthcare Associates and St Joseph Hospital, Ann Arbor, Michigan
4. Department of Internal Medicine, Hurley Medical Center, Flint, Michigan
5. Department of Internal Medicine, University of Michigan Medical School, Ann Arbor