Takashi Suda1, Hiromitsu Nagano2, Hiroshi Kawai2, Yasushi Hoshikawa2. 1. Department of Thoracic Surgery, Fujita Health University School of Medicine, Toyoake, Aichi, Japan. Electronic address: suda@fujita-hu.ac.jp. 2. Department of Thoracic Surgery, Fujita Health University School of Medicine, Toyoake, Aichi, Japan.