[1] Shikoku Canc Ctr, Dept Thorac Oncol & Med, Matsuyama, Ehime, Japan
[2] Okayama Univ Hosp, Dept Resp Med, Okayama, Japan
[3] Yamaguchi Ube Med Ctr, Dept Med Oncol, Ube, Yamaguchi, Japan
[4] Kure Med Ctr, Dept Med Oncol, Kure, Japan
[5] Okayama Univ Hosp, Ctr Innovat Clin Med, Okayama, Japan
[6] Okayama Univ, Grad Sch Med, Gen Thorac Surg & Breast & Endocrinol Surg, Okayama, Japan