1. Center for Healthcare Organization and Implementation Research, Veterans Affairs (VA) Boston Healthcare System, Boston, Massachusetts
2. Department of Surgery, Boston University School of Medicine, Boston, Massachusetts
3. Center for Health Services Research in Primary Care, Durham VA Medical Center, Durham, North Carolina
4. Division of Gastroenterology, Department of Medicine, Duke University, Durham, North Carolina
5. Durham VA Medical Center, Durham, North Carolina
6. Department of Radiology, Duke University, Durham, North Carolina
7. Division of Cardiology, Department of Medicine, VA Eastern Colorado Health Care System, Denver, Colorado
8. Department of Cardiology, University of Colorado School of Medicine, Aurora
9. Department of Urology, New York University School of Medicine, New York
10. Department of Urology, VA New York Harbor, New York
11. Division of Podiatry, Department of Surgery, VA Boston Healthcare System, Boston, Massachusetts
12. Department of Medicine, Section of Infectious Diseases, VA Boston Healthcare System, Boston, Massachusetts
13. Harvard Medical School, Boston, Massachusetts