^○Tsuyoshi Shimizu (Department of Cardiovascular Surgery, Nagano Matsushiro General Hospital)

^○Kazuhiro Yamazaki, Kenji Minatoya, Hidetoshi Masumoto, Hiroomi Nishio, Shunji Kurokawa, Kazuhiro Takatoku, Hideo Kanemitsu, Kazuhisa Sakamoto, Masahide Kawatou, Jiro Sakai, Masafumi Kudo, Makoto Nakamura, Ryo Yamamoto, Yuuta KItagata, Yujiro Ide, Tadashi Ikeda (Department of Cardiovascular Surgery, Graduate School of Medicine, Kyoto Universuty)

^○Kenji Yamamoto, Shuuji Setozaki, Mamoru Hamuro, Sakae Enomoto (Okamura memorial hospital)

^○Junichi Utoh¹, Yoshiharu Tsukamoto², Hironari Nobuoka² (1.Kumamoto Vascular Clinic, 2.Kikuchi Central Clinic)

^○Masamichi Momose, Yuri Murakami, Makiko Omori, Reo Takizawa, Takeshi Baba, Masayuki Hara, Koji Maeda, Hiromasa Tachihara, Takao Ohki (Division of vascular surgery, department of surgery, Jikei university school of medicine, Tokyo, Japan)

^○Takahiro Imai (Department of Vascular Surgery, Nishinokyo Hospital)