1. Department of Cardiovascular Medicine, Kyoto Prefectural University of Medicine , Kajii-cho 465, Kawaramachi-Hirokoji, Kamigyo-ku , Kyoto 602-8566, Japan
2. Department of Cardiovascular Medicine, Kyoto Prefectural University of Medicine , Kajii-cho 465, Kawaramachi-Hirokoji, Kamigyo-ku, Kyoto 602-8566 , Japan