^○Yuhei Saitoh, Shoichi Kyo, Hideyuki Katayama, Naoki Sumi, Takeshi Soeda (Matsue Red Cross Hospital, Matsue-city, Japan)

^○Fukuoka Masahira, Ryoma Ueda, Atsushi Awazu, Kohji Ueyama (Otsu RedCross Hospital)

^○Shinichiro Taniguchi, Tomohiro Odate, Takeshi Murakami (Sasebo Central Hospital)

^○Sachiko Kanki, Masahiro Daimon, Shinji Fukuhara, Hiroaki Uchida, Hayato Konishi, Ryo Shimada, Tatsuya Suzuki, Yoshikazu Motohashi, Hideki Ozawa, Takahiro Katsumata (Osaka Medical School. Osaka, Japan)

^○Wataru Tatsuishi¹, Kiyoharu Nakano², Tomo Yoshizumi¹, Tomonobu Abe¹ (1.Department of Cardiovascular Surgery, Gunma University, Maebashi, Japan, 2.Department of Cardiovascular Surgery, Tokyo Women's Medical University, Medi cal Center East, Arakawa-ku, Japan)

^○Masaaki Watanabe, Kennichi Muramatsu (The Division of Circulation Center (Cardiovascular Surgery), Aidu Chuo Hospital, Aiduwakamatsu, Japan)

^○Toshihiko Ichiahra¹, Michio Sasaki¹, Toshio Watanabe¹, TUKASA OONO², Kazurou Fujimoto² (1.Department of Cardiovascular Surgery, Tosei General Hospital, Seto, Japan, 2.Department of Cardiac Surgery, Nagoya University School of Medicine, Nagoya, Japan)