^○Kenri Akamine, Jun Kadono, Yuuki Nagata, Teruhiko Watanabe, Naoki Ishizaki, Masahiko Ooosako (Department of Surgery, Kagoshima Medical Association Hospital, Kagoshima, Japan)

^○Shozo Mori, Taku Aoki, Takashi Suzuki, Takayuki Shimizu, Keigo Tani, Kyung Hwa Park, Takatsugu Matsumoto, Takayuki Shiraki, Yukihiro Iso, Masato Kato, Keiichi Kubota (Department of Gastroenterological Surgery, Dokkyo Medical University, Tochigi, Japan)

^○Yu Hashimoto, Masayuki Akita, Daisuke Tsugawa, Masahide Awadu, Hideyo Mukubou, Shouhei Komatu, Akio Terai, Hisoka Kinoshita, Motofumi Tanaka, Hirochika Toyama, Masahiro Kido, Kimihiko Uen, Shinnya Kusunoki, Tetuo Ajiki, Takumi Fukumoto (Department of Hepato-Biliary-Pancreatic Surgery, Kobe University, Kobe, Japan)

^○Hongbeom Kim (Surgery Seoul National University Hospital)

^○Daiki Soma, Hiroshi Ogawa (Saiseikai Niigata Daini Hospital, Niigata, Japan)

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