1 Department of Cardiovascular Medicine, Japanese Red Cross Kumamoto Hospital, 2-1-1 Nagamine minami, Higashi-ku, Kumamoto, 862-8520, Japan. tsuyohonda-circ@umin.ac.jp.
2 Department of Cardiovascular Medicine, Japanese Red Cross Kumamoto Hospital, 2-1-1 Nagamine minami, Higashi-ku, Kumamoto, 862-8520, Japan.