1. The Patient Safety Enhancement Program; Ann Arbor VA Healthcare System; Ann Arbor Michigan
2. Department of General Medicine; University of Michigan Health System; Ann Arbor Michigan
3. Center for Quality of Care Research, Baystate Medical Center, Springfield, Massachusetts
4. The School of Public Health and Health Sciences; University of Massachussets; Amherst
5. Department of Medicine; University of Washington, Harborview Medical Center; Seattle Washington
6. Tufts University School of Medicine, Boston, Massachusetts, School of Public Health & Health Sciences, University of Massachusetts Amherst; Amherst MA