[1] Toho Univ, Sch Med, Dept Surg, Div Chest Surg,Ota Ku, 6-11-1,Omori Nishi, Tokyo 1438541, Japan
[2] Toho Univ, Sch Med, Dept Med, Div Resp Med,Ota Ku, Tokyo, Japan
[3] Toho Univ, Sch Med, Dept Adv & Integrated Interstitial Lung Dis Res, Tokyo, Japan