^○Hiroki Uchida, Yukio Iashita, Kazuhiro Tada, Kunihiro Saga, Teijiro Hirashita, Yuichi Endo, Masayuki Ohta, Masafumi Inomata (Department of Gastroenterological and Pediatric Surgery, Oita University Faculty of Medicine, Oita, Japan)

^○Ken Hayashi, Shigetoshi Yamada, Hiroshi Kusanagi (Department of Gastroenterological Surgery, Kameda medical center)

^○Yoshinao Ohbatake, Hiroyuki Takamura, Shinnichi Nakanuma, Mitsuyoshi Okazaki, Isamu Makino, Tomoharu Miyashita, Hidehiro Tajima, Itasu Ninomiya, Sachio Fushida, Tetsuo Ohta (Department of Gastroenterological Surgery, Kanazawa University Graduate School of Medical Science, Kanazawa, Japan)

^○Yoshikatsu Endo, Nanako Hata, takeshi Koujima, Tsuyoshi Kawai, Takanori Watanabe, Kyohei Kai, Shisou Sato (Japanese Red Croos Scoiety Himeji Hospital, Himeji, Japan)

^○Takashi Onoe, Megumi Yamaguchi, Kohei Ishiyama, Hirofumi Tazawa, Haruna Kubota, Masato Kojima, Shintaro Akabane, Toshihiro Misumi, Naoto Hatano, Wataru Shimizu, Takahisa Suzuki, Takeshi Sudo, Yosuke Shimizu, Takao Hinoi, Hirotaka Tashiro (Surgery, NHO Kure Medical Center, Chugoku Cancer Center, Kure, Japan)

^○Sam-Youl Yoon (Hallym University Medical Center, Sacred Heart Hospital)