^○Kazuyasu Takizawa, Takashi Kobayashi, Takuya Ando, Kizuki Yuza, Koji Toge, Yuki Hirose, Tetsuya Nakano, Hirosuke Ishikawa, Tomohiro Katada, Kohei Miura, Jun Sakata, Tosihumi Wakai (Digestive and General Surgery, Niigata Univ. Graduate School of Medicine)

^○Masahide Hiyoshi, Atsushi Nanashima, Yuki Tsuchimochi, Takeomi Hamada, Koichi Yano, Naoya Imamura, Yoshiro Fujii (Division of Hepato-Biliary-Pancreatic Surgery, Department of Surgery, Miyazaki University, Miyazaki, Japan)

^○Jaehong Jeong¹, Jun Chul Chung¹, Hyung Chul Kim¹, Jong Gill Jeong² (1.Department of Surgery, Soonchunhyang University, 2.Department of Surgery, Yeosuchonnam Hospital, South Korea)

^○Go Ohira, Ryosuke Amano, Kenjiro Kimura, Sadaaki Yamazoe, Ryota Tanaka, Jun Tauchi, Kosei Hirakawa, Masaichi Ohira (Department of Surgical Oncology (First Department of Surgery), Osaka City University Graduate School of Medicine)

^○Yoshitaka Gotoh, Takao Ohtsuka, Atsushi Fujii, Takafumi Okayama, So Nakamura, Yohei Nakashima, Yasuhisa Mori, Yoshihiko Sadakari, Kohei Nakata, Yoshihiro Miyasaka, Msafumi Nakamura (Department of Surgery and Oncology, Kyushu University, Fukuoka, Japan)

^○Mai Nakamura, Mami Ikeda, Nobuhiro Harada, Kazuma Tago, Hiroto Koyama (Japan Community Healthcare Organization Tokyo Takanawa Hospital)