^○Hajime Kinoshita, Mariko Hori, Atushi Tamura, Kei Kazuno, Hiroshige Sato, Seiichiro Murata (Department of Cardiovascular Surgery, Itabashi Chuo Medical Center, Tokyo, Japan)

^○Takeshi Shimamoto, Tatsuhiko Komiya, Michihito Nonaka, Takehiko Matsuo, Junya Kitaura, Yoshimasa Furuichi, Taiyo Jinno, Taku Shirakami, Atsushi Sugaya, Masaya Hirayama, Koji Miura, Atsushi Yano (Kurashiki Central Hospital)

^○Soichi Asano, Naoki Hayashida, Shintaroh Koizumi, Takahiro Ito, Hiroki Ikeuchi, Hideomi Hasegawa, Shinichiro Abe, Masashi Kabasawa, Kozo Matsuo, Hirokazu Murayama (Chiba Cerebral and Cardiovascular Center)

^○Katsuya Shimabukuro, Ryutaro Kimata, Shohei Mitta, Hiroki Ogura, Etsuji Umeda, Narihiro Ishida, Seijiro Yamaguchi, Kiyoshi Doi (Department of General and Cardiothoracic Surgery,Gifu University ,Gifu,Japan)