^○Kazutoshi Tachibana, Shintarou Sakurada, Shuichi Naraoka (Department of Cardiovascular Surgery, Hakodate Goryoukaku Hospital)

^○Yutaka Iba, Akira Yamada, Yoshihiko Kurimoto, Eiichiro Hatta, Ryushi Maruyama, Shuhei Miura, Mitsuihko Konno, Takuya Wada, Yuu Nakano (Deoartment of Cardiovascular Surgery, Teine Keijinkai Hospital, Sapporo, Japan)

^○Tasuku Kadowaki, Hiroki Yamaguchi, Masami Takagaki, Hiromasa Nakamura, Yousuke Ueno, Tomoyuki Aoiki, Takaki Uchida (Showa university , Koto-toyosu hospital)

^○Takanori Tsujimoto, Syota Hasegawa, Kanetsugu Nagao, Motoharu Kawashima, Yoshikatsu Nomura, So Izumi, Masamichi Matsumori, Hirohisa Murakami, Tasuku Honda, Nobuhiko Mukohara (Department of Cardovascular surgery , Himeji Brain and Heart Center , Hyogo, Japan)