1. From the Department of Cardiology (M.N., A.T., T.S., Y.N.), Baba Memorial Hospital, Sakai, Japan; the Osaka Ekisaikai Hospital (K.S., J.Y.), Osaka, Japan; Otsuka Phamaceutical Co Ltd (Y.O., S.U.), Japan; and Kishiwada City Hospital (S.N.), Kishiwada, Japan.