^○Kil Hwan Kim, Yoo-Seok Yoon, Ho-Seong Han, Jai Young Cho, YoungRok Choi, Sungho Kim, In Gun Hyun (Department of Surgery, Seoul National University Bundang Hospital, Seongnam, Korea)

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

^○Sho Yasuta, Motokazu Sugimoto, Shin Kobayashi, Shinichiro Takahashi, Masaru Konishi, Naoto Gotohda (Department of Hepatobiliary and Pancreatic Surgery, National Cancer Center Hospital East, Chiba, Japan)

^○Jun Yoshino¹, Toshiro Ogura¹, Keiiti Akahoshi¹, Kosuke Ogawa¹, Yusuke Mitsunori¹, Hiroaki Ono¹, Daisuke Ban¹, Atsushi Kudo¹, Shinji Tanaka², Minoru Tanabe¹ (1.Department of Hepatobiliary and Pancreatic Surgery, Graduate School of of Medicine, Tokyo Medical and Dental University, Tokyo, Japan., 2.Molecular Oncology, Graduate School of Medicine, Tokyo Medical and Dental University, Tokyo, Japan.)

^○Ryota Iwase, Hiroaki Shiba, Masashi Tsunematsu, Rui Marukuchi, Koichiro Haruki, Jungo Yasuda, Hironori Shiozaki, Shinji Onda, Taigo Hata, Takeshi Gocho, Yuichi Ishida, Katsuhiko Yanaga (Department of Surgery, The Jikei University School of Medicine, Tokyo, Japan)

^○Masataka Okuno, Hideo Miyake, Hidemasa Nagai, Yuichiro Yoshioka, Hiroshi Tanaka (Department Surgery, Japanese Red Cross Nagoya Daiichi Hospital)