[1] Hyogo Coll Med, Div Gen Internal Med, Nishinomiya, Hyogo 6638501, Japan
[2] Kumamoto Univ, Dept Cardiovasc Med, Grad Sch Med Sci, Kumamoto, Japan
[3] Nara Med Univ, Dept Med 1, Kashihara, Nara 634, Japan
[4] Jinnouchi Clin, Kumamoto, Japan
[5] Shizuoka City Hosp, Shizuoka, Japan