^○Hideaki Uchiyama, Takeshi Kurihara (Department of Surgery, Saiseikai Fukuoka General Hospital)

^○Hirofumi Shirakawa, Sojun Hoshimoto, Moriaki Tomikawa, Iwao Ozawa, Shoichi Hishinuma, Yoshiro Ogata, Teppei Miyakawa, Hiroki Nakanishi (Department of Surgery, Tochigi Cancer Center)

^○Masato Narita, Iwao Ikai (Department of Surgery, Kyoto Medical Center)

^○Yusuke Arakawa, Hidenori Miyake (Department of Surgery, Tokushima municipal Hospital)

^○Yoshiki Senda, Yasuhiro Shimizu, Seiji Natsume, Koji Komori, Daisuke Hayashi, Hideharu Tanaka (Department of Gastroenterological Surgery, Aichi Cancer Center Hospital)

^○Tomohiko Adachi, Shinichiro Ono, Toshiyuki Adachi, Manpei Yamashita, Hajime Matsushima, Akihiko Soyama, Masaaki Hidaka, Kengo Kanetaka, Mitsuhisa Takatsuki, Susumu Eguchi (Department of Surgery, Nagasaki University)