^○Yoshihito Kotera, Yuuji Inoue, Syunnichi Ariizumi, Akiko Omori, Singo Yamasita, Takaaki Kato, Satosi Nemoto, Masakazu Yamamoto (Department of Surgery, Institute of Gastroenterology, Tokyo Women's Medical University)

^○Takanori Ochiai, Yoshiteru Ohata, Masayoshi Sakano, Kentaro Nihei, Takahiro Igaki, Hiroki Yamana, Ryo Matsumoto, Katsumasa Saito, Shigeru Yamazaki (Department of Surgery, Ohta Nishinouchi General Hospital)

^○Takeshi Takamoto, Takuya Hashimoto, Akihiko Ichida, Kei Shimada, Maruyama Yoshikazu, Masatoshi Makuushi (Division of Hepato-Biliary-Pancreatic and Liver Transplantation Surgery, Japanese Red Cross Medical Center, Tokyo, Japan)

^○Kei Yokozuka, Naokazu Chiba, Shigeto Ochiai, Takahiro Gunji, Kousuke Hikita, Masaaki Okihara, Tooru Sano, Kouichi Tomita, Rina Tsutsui, Shigeyuki Kawachi (Department of digestive and transplantation Surgery,tokyo medical university,Hachiouji medical center)

^○Takuji Noro, Takazumi Tsunenari, Tohru Katoh, Mayumi Hoshikawa, Makoto Nishikawa, Takahiro Einama, Suefumi Aosasa, Hideki Ueno, Junji Yamamoto (Department of Surgery, National Defense Medical College)