1. University of Washington, Seattle, WA (J.A.D., R.S.H., K.E.K., J.M.M., W.L.).
2. VA Puget Sound Health Care System, Seattle, WA (J.A.D.).
3. Piedmont Heart Institute, Atlanta, GA (D.E.K.).
4. The Christ Hospital Health Network, Cincinnati, OH (R.F.R.).
5. HCA Midwest Health Heart and Vascular Institute, Overland Park, KS (S.P.M.).
6. Saint Luke’s Mid America Heart Institute, Kansas City, MO (J.A.G.).
7. University of Missouri-Kansas City, Kansas City, MO (J.A.G.).
8. New York University School of Medicine (C.A.T.).
9. Columbia University Medical Center, New York, NY (D.K., A.J.K.).