[1] Osaka Habikino Med Ctr, Dept Thorac Oncol, Osaka, Japan
[2] Natl Canc Ctr Hosp East, Dept Thorac Oncol, Tokyo, Japan
[3] Omagari Kosei Med Ctr, Tokyo, Japan
[4] Japanese Red Cross Med Ctr, Dept Med Oncol, Tokyo, Japan
[5] NHO Iwakuni Clin Ctr, Dept Resp Med, Tokyo, Japan
[6] Shimane Univ, Fac Med, Dept Internal Med, Med Oncol & Resp Med, Matsue, Shimane, Japan
[7] Hyogo Prefectural Amagasaki Gen Med Ctr, Dept Resp Med, Amagasaki, Hyogo, Japan
[8] St Marianna Univ, Sch Med, Div Resp Med, Kawasaki, Kanagawa, Japan
[9] Natl Hosp Org Hokkaido Canc Ctr, Dept Resp Med, Sapporo, Hokkaido, Japan