^○Tadayuki Sakuragawa, Motohide Simazu, Shoutarou Maruyama (Department of Surgery,Tamakyuryo Hospital, Tokyo, Japan)

^○Tetsuzo Tashima, Akihiro Murata, Yurika Iida, Syuhei Kushiyama, Genya Hamano, Masahiko Kinoshita, Kohei Nishio, Shintaro Kodai, Sadatoshi Shimizu, Akishige Kanazawa (Department of Hepato-Biliary-Pancreatic Surgery, Osaka City General Hospital, Osaka, Japan)

^○Masashi Kudo, Shin Kobayashi, Sho Yasuta, Naoki Yagi, Masatake Taniguchi, Toshiyuki Suzuki, Ryo Morisue, Hidetoshi Aizawa, Satoshi Okubo, Daigoro Takahashi, Motokazu Sugimoto, Shinichiro Takahashi, Masaru Konishi, Naoto Gotohda (Department of Hepatobiliary and Pancreatic Surgery, National Cancer Center Hospital East)

^○Masayuki Ohta, Yuichi Endo, Teijiro Hirashita, Hiroki Uchida, Yukio Iwashita, Hiroomi Takayama, Kunihiro Saga, Kazuhiro Tada, Masafumi Inomata (Department of Gastroenterological and Pediatric Surgery, Oita University, Oita, Japan)

^○Raymond Joseph Herrera Romero^1,2, Avril David¹, Romulo Ong Abrantes¹, Lauren Victoria Rellora¹, Arlyn Cañones¹, Elizabeth Domingo¹, Romeo Fernandez¹, Ernesto Tan¹, Ray Sarmiento¹, Ryan Barroso¹ (1.Department of Surgery, Section of Hepatopancreatobiliary Surgery, Rizal Medical Center, Pasig City, Philippines, 2.Department of Hepatopancreatobiliary Surgery, Hyogo College of Medicine, Nishinomiya City, Hyogo Prefecture, Japan)

^○Minako Nagai, Takahiro Akahori, Satoshi Nishiwada, Kenji Nakagawa, Kota Nakamura, Takeo Nomi, Daisuke Hokuto, Takahiro Yoshikawa, Yasuko Matsuo, Naoya Ikeda, Masayuki Sho (Department of Surgery, Nara Medical University, Nara, Japan)