[1] Dokkyo Med Univ, Koshigaya Hosp, Dept Cardiovasc & Thorac Surg, 2-1-50 Minami Koshigaya, Koshigaya 3438555, Japan
[2] Dokkyo Med Univ, Koshigaya Hosp, Dept Radiol, Koshigaya 3438555, Japan
[3] Dokkyo Med Univ, Koshigaya Hosp, Dept Resp Med, Koshigaya 3438555, Japan
[4] Dokkyo Med Univ, Koshigaya Hosp, Dept Pathol, Koshigaya 3438555, Japan
[5] Southern Tohoku Res Inst Respirol, Dept Thorac Surg, Koriyama, Fukushima 9638563, Japan
[6] Dokkyo Med Univ, Dept Thorac Surg, Mibu, Tochigi 3210293, Japan