[1] Osaka Univ, Cardiovasc Med, Suita, Osaka, Japan
[2] Osaka Gen Med Ctr, Cardiol, Osaka, Japan
[3] Amagasaki Cent Hosp, Cardiol, Amagasaki, Hyogo, Japan
[4] Osaka Natl Hosp, Cardiol, Osaka, Japan
[5] Kawanishi City Hosp, Cardiol, Kawanishi, Japan
[6] Osaka Police Hosp, Cardiol, Osaka, Japan
[7] Kobe Ekisaikai Hosp, Cardiol, Kobe, Hyogo, Japan
[8] Kansai Rosai Hosp, Cardiovasc Ctr, Amagasaki, Hyogo, Japan