1. Surgical Service; Veterans Affairs Boston Healthcare System; West Roxbury Massachusetts
2. Harvard Medical School; Boston Massachusetts
3. Department of Medicine, Division of Cardiology; Veterans Affairs Eastern Colorado Health Care System; Denver Colorado
4. School of Medicine at the Anschutz Medical Campus; University of Colorado; Aurora Colorado
5. Research and Development Office; Northport Veterans Affair Medical Center; Northport New York
6. Research and Development Office; Eastern Colorado Health Care System; Department of Veterans Affairs; Denver Colorado
7. Cooperative Studies Program Coordinating Center; Veterans Affairs Medical Center; Perry Point Maryland
8. Surgical Services; Zablocki Veterans Affairs Medical Center; Milwaukee Wisconsin
9. Department of Surgery, Division of Cardiothoracic Surgery; Medical College of Wisconsin; Milwaukee Wisconsin
10. Pittsburgh VA Medical Center; Pittsburgh Pennsylvania
11. Department of Thoracic and Cardiovascular Surgery; Cleveland Clinic; Cleveland Ohio
12. Research and Development Office; Northport Veterans Affairs Medical Center; Northport New York
13. Department of Emergency Medicine; Mayo Clinic; Rochester Minnesota
14. Division of Cardiovascular and Thoracic Surgery; Duke University Medical Center; Durham North Carolina
15. Department of Surgery; Veterans Affairs Eastern Colorado Health Care System; Denver Colorado
16. Veterans Affairs Palo Alto Health Economics Resource Center; Menlo Park California
17. Department of Surgery; Stanford University; Stanford California