^○Shinya Ueki, Kazuaki Nakanishi, Hayato Nagase, Hirotaka Shouji, Yuichi Yoshida, Michihiro Kurushima, Hiroyuki Kasajima, Toshiyuki Sato, Shinsaku Suzuki, Jun Kimura (Department of Surgery, Hakodate Municipal Hospital, Hakodate, Japan)

^○Kakeru Tawada, Hisashi Imai, Satoshi Matsui, Toshiyuki Tanahashi, Nobuhisa Matsuhashi, Kazuhiro Yoshida (Department of Surgical Oncology, Gifu University Graduate School of Medicine, Gifu, Japan)

^○Wataru Fujii, Hirofumi Akita, Kei Asukai, Akira Tomokuni, Hiroshi Wada, Hidenori Takahashi, Masato Sakon (Department of Gastroenterological Surgery, Osaka International Cancer Institute, Osaka, Japan)

^○Tatsuya Komoto, Yasunori Nishida, Kenju Kou (Department of Surgery, Aizawa Hospital, Matsumoto, Nagano, Japan)

^○Tetsuya Idichi¹, Hiroshi Kurahara¹, Kousei Maemura¹, Yuko Mataki¹, Yota Kawasaki¹, Satoru Iino¹, Masahiko Sakoda¹, Shinichi Ueno², Hiroyuki Shinchi³, Shouji Natsugoe¹ (1.Department of Digestive Surgery, Breast and Thyroid Surgery, Kagoshima University, Kagoshima, Japan, 2.Clinical Oncology, Kagoshima University, Kagoshima, Japan, 3.Health Sciences, Kagoshima University, Kagoshima, Japan)

^○Kei Asukai, Hidenori Takahashi, Hirofumi Akita, Akira Tomokuni, Hiroshi Wada, Masato Sakon, Osamu Ishikawa (Department of Surgery, Osaka International Cancer Institute, Osaka, Japan)