^○Toshimi Kaido, Yuhei Hamaguchi, Shinya Okumura, Atsushi Kobayashi, Hisaya Shirai, Siyuan Yao, Shintaro Yagi, Naoko Kamo, Shinji Uemoto (Division of Hepato-Biliary-Pancreatic and Transplant Surgery, Department of Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan)

^○Shogo Tanaka¹, Masaki Ueno², Hiroya Iida³, Masaki Kaibori⁴, Takeo Nomi⁵, Fumitoshi Hirokawa⁶, Hisashi Ikoma⁷, Takuya Nakai⁸, Hidetoshi Eguchi⁹, Hiroji Shinkawa¹, Shinya Hayami², Hiromitsu Mehira³, Morihiko Ishizaki⁴, Daisuke Hokuto⁵, Yoshihiro Inoue⁶, Rei Morimura⁷, Kohei Kawaguchi⁸, Takehiro Noda⁹, Shoji Kubo¹ (1.Department of Hepato-Biliary-Pancreatic Surgery, Osaka City University Graduate School of Medicine, Osaka, Japan, 2.Second Department of Surgery, Wakayama Medical University, Wakayama, Japan, 3.Division of Gastrointestinal, Breast, and General Surgery, Department of Surgery, Shiga University of Medical Science, Otsu, Japan, 4.Department of Surgery, Hirakata Hospital, Kansai Medical University, Hirakata, Japan, 5.Department of Surgery, Nara Medical University, Kashihara, Japan, 6.Department of General and Gastroenterological Surgery, Osaka Medical College, 7.Division of Digestive Surgery, Department of Surgery, Kyoto Prefectural University of Medicine, 8.Department of Surgery, Faculty of Medicine, Kinki University, 9.Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University)

^○Naru Kondo, Yoshiaki Murakami, Kenichiro Uemura, Naoya Nakagawa, Kenjiro Okada, Yuta Kuhara, Taijiro Sueda (Department of Surgery, Hiroshima University, Hirohsima, Japan)

^○Ryuichi Nishimura, Shigehito Miyagi, Chikashi Nakanishi, Yasuyuki Hara, Wataru Nakanishi, Kenji Shimizu, Satomi Uematsu, Yuta Kakizaki, Muneyuki Matsumura, Takashi Kamei, Michiaki Unno (Department of Surgery, Graduate School of Medicine, Tohoku University, Sendai, Japan)