[1] Natl Cerebral & Cardiovasc Ctr Hosp, Dept Biostat, Osaka, Japan
[2] Tohoku Univ, Grad Sch Med, Dept Cardiovasc Med, Sendai, Miyagi, Japan
[3] Natl Cerebral & Cardiovasc Ctr Hosp, Dept Clin Med & Dev, Osaka, Japan
[4] Natl Cerebral & Cardiovasc Ctr Hosp, Dept Prevent Med & Epidemiol, Osaka, Japan