[1] Tosei Gen Hosp, Dept Resp Med & Allergy, Seto, Japan
[2] Brigham & Womens Hosp, Ctr Pulm Funct Imaging, Boston, MA USA
[3] Nagasaki Univ, Dept Pathol, Grad Sch Biomed Sci, Nagasaki, Japan
[4] Kansai Rosai Hosp, Dept Radiol, Amagasaki, Hyogo, Japan