[1] Fukushima Med Univ, Dept Pulm Med, Fukushima, Japan
[2] Fukushima Med Univ Hosp, Clin Oncol Ctr, Fukushima, Japan
[3] Iwaki Kyoritsu Gen Hosp, Iwaki, Fukushima, Japan
[4] Fukushima Med Univ, Dept Thorac Surg, Fukushima, Japan
[5] Fukushima Red Cross Hosp, Dept Thorac Surg, Fukushima, Japan
[6] Ohta Nishinouchi Hosp, Ctr Resp Disorders, Ohta, Gunma, Japan
[7] Ohta Nishinouchi Hosp, Dept Chest Surg, Ohta, Gunma, Japan
[8] Southern Tohoku Gen Hosp, Dept Gen Thorac Surg, Sendai, Miyagi, Japan
[9] Fukushima Med Univ, Dept Pulm Med, Fukushima, Japan