^○Yasuko Uranaka¹, Keiichiro Kasama¹, Atsushi Matsumoto¹, Munetaka Masuda², Shinichi Suzuki², Keiji Uchida³ (1.Yokohama Municipal Citizens Hospital, Cardiovascular Surgery,Yokohama, Japan, 2.Yokohama City University Hospital, The Department of Surgery , Yokohama, Japan, 3.Yokohama City University Medical Center, Cadiovascular Center, Yokohama, Japan)

^○Takashi Shimada, Takashi Miura, Ichiro Matsumaru, Syun Nakaji, Kikuko Obase, Syougou Yokose, Yuuichi Tasaki, Hiroko Taguchi, Masayuki Takura, Tatuya Miyanaga, Yuugo Murakami, Kiyoyuki Eishi (Nagasaki University hospital)

^○Hiroyuki Saisho, Kazuyoshi Takagi, Koichi Arinaga, Satoru Tobinaga, Toru Takaseya, Takahiro Shojima, Yusuke Shintani, Yasuyuki Zaima, Tomofumi Fukuda, Atsunobu Oryoji, Hiroyuki Tanaka (KURUME University)

^○MASASHI KOMEDA, SHOJI FUJIWARA, TOSHIMI UJIIE (The Department of Cardiovascular Surgery, Iseikai Hospital, Osaka, Japan)

^○Hiroki Kohno, Hideki Ueda, Kaoru Matsuura, Yoshinori Enomoto, Michiko Watanabe, Tomohiko Inui, Yasunori Yakita, Daisuke Hiraoka, Tomoyoshi Kanda, Masahiko Fujii, Shuntaro Ito, Goro Matsumiya (Chiba University Hospital, Department of Cardiovascular Surgery)

^○Yasushige Shingu, Nobuyasu Kato, Tomonori Ooka, Suguru Kubota, Yoshiro Matsui (Hokkaido University)