^○Sayuri Ezaki, Yoshito Tomimaru, Kozo Noguchi, Keizo Dono (Department of Surgery, Toyonaka Municipal Hospital, Osaka, Japan)

^○Ryota Kiuchi, Takanori Sakaguchi, Ryo Kitajima, Satoru Furuhashi, Makoto Takeda, Takanori Hiraide, Yasushi Shibasaki, Yoshifumi Morita, Hirotoshi Kikuchi, Hiroya Takeuchi (Second Department of Surgery, Hamamatsu University School of Medicine, Hamamatsu, Japan)

^○Takayuki Shimizu, Keiichi Kubota, Takayuki Shiraki, Shozo Mori, Yukihiro Iso, Masato Kato, Taku Aoki (Second Department of Surgery, Dokkyo Medical University)

^○Bibek Aryal¹, Toshiaki Shimizu², Jun Kadono¹, Akira Furoi³, Kentaro Gejima¹, Teruo Komokata⁴, Chihaya Koriyama⁵, Munekazu Yamakuchi², Teruto Hashiguchi², Yutaka Imoto¹ (1.Cardiovascular and Gastroenterological Surgery, Kagoshima University, Kagoshima, Japan, 2.Department of Laboratory and Vascular Medicine, Kagoshima University, 3.Department of Surgery, Kirishima Medical Center, 4.Department of Surgery, Kagoshima Medical Center, 5.Department of Epidemiology and Preventive Medicine, , Kagoshima University)

^○Satoru Yoshida, Yoshihito Nakayama, Kengo Asami (Department of Surgery, Hachinohe City Hospital, Aomori, Japan)

^○Kentaro Oji, Takeshi Urade, Hidehiro Sawa, Yoshiteru Iwatani (Department of Surgery and Digestive Surgery, Kita-Harima Medical Center, Hyogo, Japan)