^○Takahide Ikeda, Michio Ueda, Itaru Hashimoto, Yuko Sugawara, Ryo Takagawa, Daisuke Inagaki, Hitoshi Murakami, Tomohiko Osaragi, Seiji Hasegawa, Hideyuki Ike, Tadao Fukushima (Department of Surgery, Saiseikai Yokohamashi Nanbu Hospital, Yokohama, Japan)

^○Kodai Tomioka, Tomotake Koizumi, Tomokazu Kusano, Yuta Enami, Akira Fujimori, Kosuke Yamada, Koji Nogaki, Yoshihiko Tashiro, Tomoki Hakozaki, Takeshi Aoki, Masahiko Murakami (Devision of gastroenterological and general Surgery, Department of Surgery, Showa University, Tokyo, Japan)

^○Tatsuya Yamazaki, Tomotake Koizumi, Yusuke Wada, Takahito Hirai, Kodai Tomioka, Tomoki Hakozaki, Yoshihiko Tashiro, Koji Nogaki, Kosuke Yamada, Kazuhiro Matsuda, Tomokazu Kusano, Akira Fujimori, Yuta Enami, Takeshi Aoki, Masahiko Murakami (Department of Surgery, Division of Gastroenterological and General Surgery, Showa University School of Medicine)

^○Makoto Murakami¹, Takuma Nishino¹, Mitsuhiro Morikawa¹, Kenji Koneri¹, Yasuo Hirono¹, Takanori Goi¹, Kanji Katayama² (1.First Department of Surgery, University of Fukui, School of Medicine, 2.Cancer Care Promotion Center, Fukui University Hospital)

^○Shuichi Fujioka¹, Takeyuki Misawa¹, Hiroaki Kitamura¹, Yu Kumagai¹, Tadashi Akiba¹, Jungo Yasuda², Yuichi Ishida², Katsuhiko Yanaga² (1.Department of Surgery, Jikei University Kashiwa Hospital, Kashiwa, Chiba, Japan, 2.Department of Surgery, Jikei University School of Medicine, Tokyo, Japan)

^○Takeshi Nishi, Yasunari Kawabata, Hikota Hayashi, Yoshitsugu Tajima (Department of Digestive and General Surgery, Shimane University Faculty of Medicine)