1 Department of Cardiology, Kanto Central Hospital of the Mutual Aid Association of Public School Teachers, 6-25-1 Kamiyoga, Setagaya-Ku, Tokyo, 58-8531, Japan. always_bj_ns@yahoo.co.jp.
2 Department of Cardiology, Kanto Central Hospital of the Mutual Aid Association of Public School Teachers, 6-25-1 Kamiyoga, Setagaya-Ku, Tokyo, 58-8531, Japan.
3 Department of Clinical Laboratory, Kanto Central Hospital of the Mutual Aid Association of Public School Teachers, 6-25-1 Kamiyoga, Setagaya-Ku, Tokyo, 58-8531, Japan.