1. Division of Cardiology, Emory Structural Heart and Valve Center, Emory University Hospital Midtown, Atlanta, GA (H.A.U., J.X., G.S.H., I.B., C.M.D., A.B.G., V.C.B., P.T.G.).
2. Division of Cardiothoracic Surgery, Emory University School of Medicine, Atlanta, GA (G.P., K.J.G.).