[1] Okinawa Chubu Hosp, Resp Med, Uruma, Japan
[2] Hamamatsu Univ Sch Med, Dept Internal Med, Div 2, Hamamatsu, Shizuoka, Japan
[3] Teikyo Univ, Dept Rheumatol, Chiba Med Ctr, Ichihara, Chiba, Japan
[4] Natl Def Med Coll, Dept Radiol, Tokorozawa, Saitama, Japan
[5] Natl Hosp Org Tokyo Natl Hosp, Dept Pathol, Kiyose, Japan