1. Division of Thoracic and Cardiovascular Surgery (G.A., I.L.K.), University of Virginia, Charlottesville.
2. Division of Cardiology (D.S.L.), University of Virginia, Charlottesville.
3. Heart Hospital Baylor Plano, Baylor HealthCare System, Dallas, TX (M.J.M.).
4. Heart Institute, Cedars Sinai Medical Center, Los Angeles, CA (A.T., S.K.).
5. Baylor University Medical Center, Baylor Heart and Vascular Institute, Dallas, TX (P.A.G.).
6. Duke University Medical Center, Durham, NC (D.D.G., A.W.).
7. Division of Cardiology, University of California, San Francisco (E.F., A.Q.).
8. MedStar Health Research Institute, Hyattsville, MD (N.J.W.).
9. Abbott Vascular, Santa Clara, CA (J.E., L.C., F.F.).
10. Northshore University Health System, Evanston, IL (P.J.P., T.F.).