[1] Natl Hosp Org Toneyama Natl Hosp, Dept Thorac Oncol, Toyonaka, Osaka, Japan
[2] Univ Calif San Francisco, Div Oncol, San Francisco, CA 94143 USA
[3] Osaka Int Canc Inst, Dept Thorac Oncol, Osaka, Japan
[4] Kobe Minimally Invas Canc Ctr, Dept Pulm Oncol, Kobe, Hyogo, Japan
[5] Natl Hosp Org Osaka Toneyama Med Ctr, Dept Thorac Oncol, Toyonaka, Osaka, Japan
[6] Takarazuka City Hosp, Med Oncol, Takarazuka, Hyogo, Japan