[1] Natl Hosp Org, Kinki Chuo Chest Med, Dept Internal Med, Sakai, Osaka, Japan
[2] Natl Hosp Org, Kinki Chuo Chest Med, Clin Res Ctr, Sakai, Osaka, Japan
[3] Natl Hosp Org, Kinki Chuo Chest Med, Dept Pathol, Sakai, Osaka, Japan
[4] Natl Hosp Org, Minami Wakayama Med Ctr, Dept Pathol, Wakayama, Japan
[5] Iwata City Hosp, Dept Resp Med, Iwata, Shizuoka, Japan
[6] Natl Hosp Org, Kinki Chuo Chest Med Ctr, Dept Radiol, Sakai, Osaka, Japan