1 Department of Cardiovascular Medicine, Graduate School of Medical Sciences, Kumamoto University, Japan. (T.H., M. Ishii, H.K., H.S., S.K., T.K., Y. Tsuruta, K. Matsunaga, Y. Tsurusaki, K.T.).
2 Miyazaki Medical Association Hospital Cardiovascular Center, Japan (K.A., M. Ito).
3 Division of Cardiology, Kumamoto Chuo Hospital, Japan (K. Morihisa).
4 Division of Pharmacology and Therapeutics, Graduate School of Medical Sciences, Kumamoto University, Japan. (K.O., J.S.).