[1] Tochigi Canc Ctr, Div Thorac Surg, Utsunomiya, Tochigi, Japan
[2] Tochigi Canc Ctr, Utsunomiya, Tochigi, Japan
[3] Div Pathol, Utsunomiya, Tochigi, Japan
[4] Tochigi Canc Ctr, Div Thorac Oncol, Dept Med Oncol, Utsunomiya, Tochigi, Japan
[5] Nagoya Univ, Nagoya, Aichi 4648601, Japan