1. Division of Cardiology, Department of Medicine, Nihon University School of Medicine, Tokyo, Japan (K.N., Y.O., I.W., K.I., R.W., M.A., Y.W., S.K., H.M., T.N., K.O., A.H.).
2. Department of Cardiology, Dokkyo Medical University Koshigaya Hospital, Saitama, Japan (S.N., Y.H.).