^○Yoshiyuki Sato, hirono satokawa, shinya takase, hiroki wakamatsu, hiroyuki kurosawa, yuki seto, takashi igarashi, akihiro yamamoto, tsuyoshi fujimiya, keiichi ishida, hitoshi yokoyama (Fukushima medical university, Fukushima,Japan)

^○Junya Kitaura, Tatsuhiko Komiya, Takeshi Shimamoto, Michihito Nonaka, Takehiko Matsuo, Yoshimasa Furuichi, Taiyo Jinno, Taku Shirakami, Athushi Sugaya, Masaya Hirayama, Koji Miura, Astushi Yano (Department of Cardiovascular Surgery, Kurashiki central hospital, Okayana, Japan)

^○Yuki Okamoto, Kazuo Yamamoto, Fuyuki Asami, Mitsuhiro Kimura, Eiichi Ooba, Yuki Takesue, Maiko Umezawa, Shinpei Yoshii (Tachikawa Medical Center, Nagaoka, Japan)

^○Kenta Nishiya, Takanobu Aoyama, Masanori Sakaguchi, Yasuyuki Bito, Goki Inno, Atsutaka Aratame, Yasuyuki Sasaki (Osaka city general hospital)

^○Satoshi Kuroyanagi, Shinichi Higashiue, Masatoshi Komooka, Onishi Furuya, Norihiko Hiramatsu, Saburou Kojima, Makoto Matsuura, Kensuke Kasuga, Tetsushi Takemoto (Kishiwada Tokusyukai Hospital Cardio Vascular Surgery)

^○Hyoe Komae, Takafumi Inoue, Yasuhiro Hoshino, Masahiko Ando, Sachito Minegishi, Shogo Shimada, Osamu Kinoshita, Haruo Yamauchi, Kan Nawata, Minoru Ono (The University of Tokyo Hospital, Department of Cardiac Surgery)

^○Junya Yokoyama^1,2, Daisuke Yoshioka¹, Koichi Toda¹, Shigeru MIyagawa¹, Yasushi Yoshikawa¹, Toshihiro Funazu², Yoshiki Sawa¹ (1.Osaka University, 2.Rinku General Medical Center)