[1] Gifu City Hosp, Dept Pulm Med, Gifu, Japan
[2] Osaka City Gen Hosp, Dept Clin Oncol, Osaka, Japan
[3] Kyushu Natl Canc Ctr, Dept Thorac Oncol, Fukuoka, Japan
[4] Kumamoto Univ, Sch Med, Dept Pulm Med, Kumamoto 860, Japan
[5] Kyushu Natl Canc Ctr, Dept Clin Trial, Fukuoka, Japan
[6] Kinki Univ, Sch Med, Dept Radiat Oncol, Higashiosaka, Osaka 577, Japan
[7] Kinki Univ, Sch Med, Dept Med Oncol, Higashiosaka, Osaka 577, Japan