^○Masaaki Naganuma, Tomoyuki Tadano, Makoto Takahashi, Naoya Terao, Hiroki Takaya, Koyu Watanabe, Tomoyuki Suzuki, Yusuke Suzuki, Ichiro Yoshioka, Goro Takahashi, Masatoshi Akiyama, Kiichiro Kumagai, Osamu Adachi, Yoshikatsu Saiki (Division of Cardiovascular Surgery Tohoku University Graduate School of Medicine. Sendai. Japan)

^○Kenshi Yoshimura, Hirotsugu Hamamoto (Almeida Memorial Hospital)

^○Ken-ichi Imasaka, Hiroki Sakai, Kazuyuki Miyamoto (Department of Cardiovascular Surgery, Fukuoka Red Cross Hospital, Fukuoka, Japan)

^○Keisuke Kamada, Yuta Koichi, Naohiro Wakabayashi, Hayato Ise, Chiharu Tanaka, Sentaro Nakanishi, Natsuya Ishikawa, Hiroyuki Kamiya (Asahikawa Medical University Cardiacsurgery)

^○RYOUGEN YOON, SYUICHIRO TAKANASHI, TOMOYA UCHIMURO (SAKAKIBARA MEMORIAL HOSPITAL,TOKYO,JAPAN)