[1] Kyushu Natl Canc Ctr, Dept Thorac Oncol, Fukuoka, Japan
[2] Natl Canc Ctr, Dept Med Oncol, Tokyo, Japan
[3] Canc Inst Hosp, Dept Thorac Med Oncol, Tokyo, Japan
[4] Natl Canc Ctr Hosp E, Dept Thorac Oncol, Kashiwa, Chiba, Japan
[5] Aichi Canc Ctr Hosp, Dept Thorac Oncol, Nagoya, Aichi 464, Japan
[6] Shizuoka Canc Ctr, Thorac Oncol Div, Nagaizumi, Shizuoka, Japan
[7] Natl Hosp Org, Dept Thorac Oncol, Kinki Chuo Chest Med Ctr, Osaka, Japan
[8] Kinki Univ, Sch Med, Dept Med Oncol, Osaka 589, Japan