^○Toshiyuki Mori, Yutaka Suzuki (Department of Surgery, Kyorin University)

^○Sun Whe Kim (Seoul National University Hospital, Seoul, Korea)

^○Masayuki Ohtsuka, Hideyuki Yoshitomi, Katsunori Furukawa, Tsukasa Takayashiki, Satoshi Kuboki, Shigetsugu Takano, Daisuke Suzuki, Nozomu Sakai, Shingo Kagawa, Hiroyuki Nojima, Takashi Mishima, Eri Nakadai (Department of General Surgery, Graduate School of Medicine, Chiba University, Chiba, Japan)

^○Shinichi Miyagawa (First Department of Surgery, Shinshu University, School of Medicine)

^○Tomoki Ebata, Takashi Mizuno, Yukihiro Yokoyama, Tsuyoshi Igami, Junpei Yamaguchi, Shunsuke Onoe, Masato Nagino (Division of Surgical Oncology, Nagoya University Hospital)