[1] Hamamatsu Med Ctr, Div Thorac Surg, Dept Thorac Surg, Naka Ku, Hamamatsu, Shizuoka 4328580, Japan
[2] East Hosp, Natl Canc Ctr, Dept Thorac Oncol, Div Thorac Surg, Kashiwa, Chiba, Japan
[3] Japanese Fdn Canc Res, Canc Inst Hosp, Dept Thorac Surg Oncol, Tokyo, Japan
[4] East Hosp, Natl Canc Ctr, Res Ctr Innovat Oncol, Div Pathol, Kashiwa, Chiba, Japan
[5] Japanese Fdn Canc Res, Inst Canc, Dept Pathol, Tokyo 170, Japan
[6] East Hosp, Natl Canc Ctr, Div Head & Neck Surg, Kashiwa, Chiba, Japan
[7] Japanese Fdn Canc Res, Canc Inst Hosp, Dept Head & Neck Oncol, Koto Ku, Tokyo, Japan