Author information:
(1)Department of Cardiology, Japan Self-Defense Forces Central Hospital, Ikejiri 
1-2-24, Setagaya-ku, Tokyo, 154-8532, Japan. junko_k1981@yahoo.co.jp.
(2)Department of Cardiology, KKR Mishuku Hospital, Tokyo, Japan. 
junko_k1981@yahoo.co.jp.
(3)Department of Cardiology, Japan Self-Defense Forces Central Hospital, Ikejiri 
1-2-24, Setagaya-ku, Tokyo, 154-8532, Japan.
(4)Department of Cardiology, KKR Mishuku Hospital, Tokyo, Japan.
(5)Department of Cardiovascular Medicine, National Cerebral and Cardiovascular 
Center, Osaka, Japan.
(6)Laboratory of Molecular Genetics, National Cerebral and Cardiovascular 
Center, Osaka, Japan.
(7)Department of Cardiovascular Medicine, Nippon Medical School, Tokyo, Japan.