[1] Osaka City Gen Hosp, Dept Clin Oncol, Osaka, Japan
[2] Kinki Univ, Dept Med Oncol, Osaka, Japan
[3] Kinki Univ, Osakasayama, Japan
[4] Natl Canc Ctr Hosp East, Div Thorac Oncol, Chiba, Japan
[5] Natl Canc Ctr Hosp East, Div Thorac Oncol, Kashiwa, Chiba, Japan
[6] Nippon Boehringer Ingelheim Co Ltd, Med Dev Div, Tokyo, Japan
[7] Nippon Boehringer Ingelheim Co Ltd, Med Dev Div, Kobe, Hyogo, Japan
[8] Boehringer Ingelheim GmbH & Co KG, Biberach, Germany
[9] Kinki Univ, Fac Med, Higashiosaka, Osaka 577, Japan