^○Tomofumi Ohashi, Kenji Sakai, Yuhi Shimura, Marie Todo, Ryugo Teranishi, Hideki Osawa, Keigo Yasumasa, Hiroshi Noro, Takafumi Hirao, Nobuyoshi Hatanaka, Yoshio Yamasaki (Japan Community Health Care Organization Osaka Hospital, Osaka, Japan)

^○Kazuya Yamaguchi, Shouichi Satou, Harufumi Maki, Atsuki Nagao, Yasushi Harihara (Dept of Surgery, NTT Medical Center Tokyo)

^○Limael E. Rodriguez, Jorge Sanchez-Vivaldi, Miguel Velez, Pedro Gomez, Garcia-Gubern, Miguel Serpa, Jorge Martinez-Trabal, Hiram Soler-Bernardini, Laura Rodriguez, Felipe Sanchez-Gaetan, Guillermo Bolanos-Avila (Department of Surgery, St. Luke's Memorial Hospital, Ponce Health Sciences University, Ponce, PR, USA)

^○Takuto Yoshida, Hiroki Sunagawa, Takayuki Watanabe, Aoi Fujikawa, Taketo Matsubara, Takashi Taketa, Akihiro Suzuki, Gen Shimada, Keisuke Kubota, Seiji Ohigashi, Shintaro Sakurai, Akihiro Kishida (General Surgery Department, St Luke's Hospital, Tokyo, Japan)

^○Takahito Hirai, Murakami Masahiko, Aoki Takeshi, kodai Tomioka, hidetaka Shibata, Tomoki Hakozaki, Yusuke Wada, Yoshihiko Tashiro, Koji Nogaki, kazuhiro Matsuda, Kosuke Yamada, Tomokazu Kusano, Tomokazu Koizumi, Akira Fujimori, Yuta Enami, Takashi Kato (Department of Gastroenterological and General Surgery ,Showa University)

^○Tomoyuki Abe, Hironobu Amano, Tetsuya Mochizuki, Toshikatsu Fukuda (Department of Surgery, Onomichi general Hospital)