^○Mitsutaka Sugita, Masahiro Fuse, Eiichi Nakao, Tomoya Hirai, Hiroki Fujiwara, Manabu Maebashi, Natsuko Sugimasa, Yuka Abe, Akira Watanabe, Hidetaka Ono, Hiroyuki Baba, Tetsuo Abe (Department of Surgery, Yokohama City Minato Red Cross Hospital)

^○Minoru Kitago¹, Koich Aiura², Keiichi Suzuki³, Masaya Shito², Sojun Hoshimoto², Junichi Matsui⁴, Yutaka Takigawa⁴, Masatsugu Ishii⁵, Hiroshi Yagi¹, Yuta Abe¹, Taizo Hibi¹, Kiminori Takano¹, Go Oshima¹, Yusuke Fujita¹, Syunichi Imai¹, Yutaka Nakano¹, Yuki Masuda¹, Yutaka Endo¹, Masahiro Shinoda¹, Osamu Itano¹, Yuko Kitagawa¹ (1.Department of Surgery, Keio University School of Medecine, Tokyo, Japan, 2.Department of Surgery, Kawasaki Municipal Hospital, Kawasaki, Japan, 3.Department of Surgery, Kitasato Institute Hospital, Tokyo, Japan, 4.Department of Surgery, Tokyo Dental College Ichikawa General Hospital, Tokyo, Japan, 5.Department of Surgery, Isehara Kyodo Hospital, Kanagawa, Japan)

^○Hiroki Hayashi, Kyohei Ariake, Masamichi Mizuma, Tatsuo Hata, Masahiro Iseki, Tatsuyuki Takadate, Kunihiro Masuda, Masaharu Ishida, Koji Fukase, Hideo Ohtsuka, Takanori Morikawa, Kei Nakagawa, Fuyuhiko Motoi, Takeshi Naitoh, Michiaki Unno (Department of Surgery, Tohoku Univeisity, Sendai, Japan)

^○Daegwang Yoo, Sang Hyun Shin, Yejong Park, Dae Wook Hwang, Ki Byung Song, Jae Hoon Lee, Seung Jae Lee, Guisuk Park, Kwang-Min Park, Young-Joo Lee, Song Cheol Kim (Division of Hepato-Biliary and Pancreatic Surgery, Department of Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea)

^○Nikolay Vasilev Belev, Radoslav Penkov, Panche Krastev, Hristo Kolarov, Georgy Dgarov, Evgeny Moshekov (UMHAT-EuroHospital, Surgical Department, Plovdiv, Bulgaria)

^○Roberto Valente, Urban Arnelo, Marcus Hansson Reuterwall, ZeeshanAteeb, Elena Rangelova, Kimitaka Tanaka, Raffaella Pozzi Mucelli, Marco Del Chiaro (Karolinska University Hospital, Stockholm, Sweden)