From the Cardiovascular Division, Department of Medicine, Brigham and Women’s Hospital, Boston, Mass (R.Y.K., H.S., H.W., G.V., V.G., K.S.); Division of Cardiology, Department of Medicine, University of Western Ontario, London, Ontario, Canada (S.S.); and Cardiology Unit, University of Vermont College of Medicine, Burlington (K.A.B.).(2008-09-02時点)