[1] Shimada Municipal Hosp, Div Cardiol, Shimada, Japan
[2] Kyoto Univ, Dept Cardiovasc Med, Grad Sch Med, Kyoto, Japan
[3] Hyogo Coll Med, Dept Clin Epidemiol, Nishinomiya, Hyogo, Japan
[4] Kokura Mem Hosp, Dept Cardiol, Kokura, Japan
[5] Shizuoka City Shizuoka Hosp, Dept Cardiol, Shizuoka, Japan
[6] Kobe City Med Ctr, Dept Cardiovasc Med, Gen Hosp, Kobe, Hyogo, Japan
[7] Kurashiki Cent Hosp, Dept Cardiovasc Med, Kurashiki, Okayama, Japan
[8] Tenri Hosp, Dept Cardiol, Tenri, Nara, Japan
[9] Kinki Univ, Fac Med, Nara Hosp, Div Cardiol, Ikoma, Japan
[10] Mitsubishi Kyoto Hosp, Dept Cardiol, Kyoto, Japan
[11] Kinki Univ Hosp, Dept Cardiol, Osakasayama, Japan
[12] Osaka Red Cross Hosp, Dept Cardiovasc Ctr, Osaka, Japan
[13] Kyoto Univ, Grad Sch Med, Dept Cardiovasc Surg, Kyoto, Japan