Institution: | a Division of Thoracic Surgery, Tochigi Cancer Center, Utsunomiya, Tochigi, Japan c Division of Thoracic Diseases, Tochigi Cancer Center, Utsunomiya, Tochigi, Japan d Division of Pathology, Tochigi Cancer Center, Utsunomiya, Tochigi, Japan b Division of Thoracic Surgery, Nagoya University Graduate School of Medicine, Nagoya, Aichi, Japan |