[1] Kyoto Univ, Grad Sch Med, Dept Cardiovasc Med, Kyoto, Japan
[2] Kyoto Univ Hosp, Kyoto 606, Japan
[3] Kobe City Med Ctr Gen Hosp, Kobe, Hyogo, Japan
[4] Kinki Univ Hosp, Nara Dept Med, Nara, Japan
[5] Kumamoto Univ Hosp, Kumamoto, Japan
[6] Kagoshima Univ, Kagoshima 890, Japan
[7] Hyogo Kenritsu Amagasaki Hosp, Amagasaki, Hyogo, Japan
[8] Kurashiki Cent Hosp, Dept Cardiol, Kurashiki, Okayama, Japan