^○Ryo Harada, Akihiro Oikawa, Ryosuke Nomaguchi, Hiroshi Satou, Naomi Yasuda, Yousuke Yanase, Yusuke Kuroda, Toshiro Ito, Hirohisa Doi, Nobuyoshi Kawaharada (Sapporo Medical University Department of Cardiovascular Surgery)

^○Shintaro Kuwauchi, Mitsuharu Hosono, Naoki Taniguchi, Takayuki Okada, Hiroshi Yasumoto, Shinya Kanemoto, Nobuya Zempo, Naoki Minato, Kohei Kawazoe (Department of Cardiovascular Surgery, Kansai Medical University)

^○Yuta Kanazawa, Masahiko Ezure, Yutaka Hasegawa, Yasuyuki Yamada, Joji Hoshino, Shuichi Okada, Hiroyuki Morishita, Toru Kaga (Division of Cardiovascular Surgery, Gunma Prefectural Cardiovascular Centre)

^○Senri Miwa, Hisashi Sakaguchi, Shinya Takimoto, Toichi Tara, Yosuke Sugita, Atsushi Iwakura (Tenri Hospital)

^○Naoki Washiyama, Norihiko Shiiya, Katsushi Yamashita, Daisuke Takahashi, Kazumasa Tsuda, Yumi Kando, Yuko Ohashi (First Department of Surgery, Hamamatsu University School of Medicine, Hamamatsu, Japan)