1. Cardiovascular Division, Structural Heart and Valve Center, Vanderbilt University Medical Center, Nashville, TN (B.R.L.).
2. Cardiovascular Division, UCLA Medical Center, Los Angeles, CA (G.C.F.).
3. American Heart Association (G.M., H.M.A., C.R., K.T., A.A., M.S., M.J.).
4. St. Luke’s Mid America Heart Institute, University of Missouri-Kansas City (S.V.A.).
5. Cardiovascular Division, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA (P.B.S.).
6. Department of Cardiac Surgery, University of Pennsylvania, Philadelphia (W.Y.S.).
7. Cardiovascular Division, Northwestern Medical Center, Chicago, IL (C.W.Y.).
8. Cardiovascular Division, University of Washington Medical Center, Seattle (C.M.O.).