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

^○Kazunori Ota, Naoki Asano, Kazuho Niimi, Masahito Saito, Shigeyoshi Gon, Kei Torikai, Hiroshi Takano (Dokkyo Medical University Saitama Medical Center)

^○Yuko Ohashi, Norihiko Shiiya, Katsuji Yamasita, Naoki Washiyama, Daisuke Takahashi, Kazumasa Tsuda, Yumi Kandou (First Department of Surgery, Hamamatsu University School of Medicine, Hamamatsu city, Japan)

^○kazuma kanetsuki, satoshi kamihira, tomoki hanada, masanobu yamauchi (Shimane Prefectural Central Hospital, Cardiovascular surgery)

^○Shinichiro Yoshino, Shun Kurose, Ken Nakayama, Sho Yamashita, Keiji Yoshiya, Koichi Morisaki, Tadashi Furuyama, Tomoharu Yoshizumi (Kyushu University)

^○Takao Miki, Kiyomitsu Yasuhara, Tadashi Umeno, Hanako Hirai, Shyuichi Okonogi, Satoshi Ohki, Tamiyuki Obayashi (Department of Cardiovascular Surgery, Isesaki Municipal Hospital, Isesaki City, Gunma Prefecture, Japan)

^○Takahiro Mizoguchi, Noriyasu Morikage, Ryo Otsuka, Takashi Nagase, Makoto Samura, Takasuke Harada, Kotaro Suehiro, Kimikazu Hamano (Departments of Surgery and Clinical Sciences, Graduate School of Medicine, Yamaguchi University, Ube, Yamaguchi, Japan)

^○Takashi Azuma, Yoshihiko Yokoi, Satoru Domoto, Shougo Isomura, Kaoru Hattori, kei Kobayashi, Chihiro kashiwamura, Shintaro Sawa, Atomu Hino, Shouichi Irie, Kousuke Nakamae, Kouji Aze, Daishi Ikehara, Hiroshi Niinami (Tokyo Women's Medical University)