^○Mitsumasa Hata, Kenji Akiyama, Shinji Wakui, Yusuke Ishii, Munehito Arimoto, Saki Suzuki, Masashi Tanaka (Department of Cardiovascular Surgery, Nihon University School of Medicine)

^○KOIHCI MORIOKA, TAKAAKI KOSHIJI, TAE MIZUNAGA, KEITA YANO, YUKO KAWAMURA, SAWAKA TANABE, ATSUSHI TAKAMORI, NARIHISA YAMADA (Department of Cardiovascular surgery, Faculty of Medical Sciences, University of Fukui)

^○Muneaki Yamada, Yasuyuki Kato, Yasuyuki Kannno, Takashi Kato, Masayuki Ishikawa, Hiroshi Kiyama, Toshiya Koyanagi (Department of Cardiovascular Surgery, Saitama Sekishinkai Hospital, Sayama, Japan)

^○Nobuhisa Ohno, Toushi Maeda, Otohime Kato, Kentaro Watanabe, Go Ueno, Kosuke Yoshizawa, Keiichi Fujiwara (Department of Cardiovascular Surgery, Hyogo Prefectural Amagasaki General Medical Center)

^○Kenji Iino, Hideyasu Ueda, Satoru Hashimoto, Hironari No, Shintaro Takago, Yoshitaka Yamamoto, Hiroki Kato, Keiichi Kimura, Hirofumi Takemura (Department of Thoracic, Cardiovascular and General Surgery, Kanazawa University, Kanazawa, Japan)

^○Jun Hayashi, Toshihisa Asakura, Akihiro Yoshitake, Chiho Tokunaga, Masato Tochii, Akitoshi Takazawa, Akihiro Izumida, Daisuke Kaneyuki, Atsushi Iguchi, Hiroyuki Nakajima (Saitama Medical University International Medical Center, Department of Cardiovascular Surgery)

^○Keijiro Katayama, Shinya Takahashi, Takanobu Okazaki, Shohei Morita, Masazumi Watanabe, Yoshitaka Yamane, Tatsuya Kurosaki, Taijiro Sueda (Dept. of Cardiovascular Surgery, Hiroshima Univ. Hospital)