^○Takeshi Takahara, Hiroyuki Nitta, Yasushi Hasegawa, Hirokatsu Katagiri, Shouji Kanno, Daiki Takeda, Kenji Makabe, Akira Sasaki (Department of Surgery, Iwate Medical University School of Medicine)

^○Kunihito Gotoh¹, Hidetoshi Eguchi¹, Yoshifumi Iwagami¹, Daisaku Yamada¹, Tadafumi Asaoka¹, Takehiro Noda¹, Koichi Kawamoto¹, Shogo Kobayashi¹, Koji Umeshita², Yuichiro Doki¹, Masaki Mori¹ (1.Department of Gastroenterological Surgery, Osaka University, Japan, 2.Division of Health Science, Osaka University, Osaka, Japan.)

^○Shugo Mizuno, Akihiro Tanemura, Aoi Hayasaki, Takehiro Fujii, Yusuke Iizawa, Hiroyuki Kato, Yasuhiro Murata, Naohisa Kuriyama, Yoshinori Azumi, Masashi Kishiwada, Masanobu Usui, Hiroyuki Sakurai, Shuji Isaji (Department of Hepatobiliary Pancreatic & Transplant Surgery, Mie University Graduate School of Medicine)

^○Sho Ibuki¹, Masahiro Shinoda¹, Hideaki Obara¹, Minoru Kitago¹, Hiroshi Yagi¹, Yuta Abe¹, Kentaro Matubara¹, Kiminori Takano¹, Go Oshima¹, Taizo Hibi², Osamu Itano^1,3, Tatsuo Kuroda¹, Yuko Kitagawa¹ (1.Department of Surgery, Keio University, Tokyo, Japan, 2.Department of Transplantation/Pediatric Surgery, Kumamoto University Graduate School of Medical Sciences, Kumamoto, Japan, 3.Department of Hepato-Biliary-Pancreatic & Gastrointestinal Surgery, International University of Health and Welfare School of Medicine, Chiba, Japan)