^○Hiroaki Sakamoto, TOMOMI NAKAJIMA, HIDEYUKI KATO, MUNEAKI MATSUBARA, MIO NOMA, SEIGO GOMI, YUICHIRO KAMINISHI, MOTOO OSAKA, YUJI HIRAMATSU (University of Tsukuba)

^○Yuichi Tara, Yousuke Sugita, Shinya Takimoto, Hisashi Sakaguchi, Senri Miwa, Atushi Iwakura (Tenri Hospital)

^○Ken Nakamura¹, Tetsuro Uchida², Kimihiro Kobayashi¹, Cholsu Kim¹, Hideaki Uchino¹, Takao Shimanuki¹, Azumi Hamasaki², Mitsuaki Sadahiro² (1.Department of Cardiovascular Surgery, Nihonkai General Hospital, Yamagata, Japan, 2.Second Department of Surgery, Yamagata University Faculty of Medicine)

^○Hirofumi Kasahara¹, Hankei Shin¹, Kentaro Yamashita¹, Mitsuharu Mori² (1.Tokyo Dental College Ichikawa General Hospital, 2.Saiseikai Yokohamashi Tobu Hospital)

^○Tetsuro Uchida, Azumi Hamasaki, Yoshinori Kuroda, Masahiro Mizumoto, Atsushi Yamashita, Shuto Hirooka, Ai Ishizawa, Kentaro Akabane, Mitsuaki Sadahiro (Second Department of Surgery, Yamagata University Hospital, Yamagata, Japan)