From the Cardiovascular Department, LDS Hospital and Intermountain Medical Center (J.B.M., H.T.M., D.G.R., J.L.A., B.D.H.) and University of Utah (J.B.M., D.G.R., J.L.A.), Salt Lake City, and Brigham Young University (C.A.P.), Provo, Utah.(2006-12-05時点)