^○Ai Ishizawa, Azumi Hamasaki, Tetsuro Uchida, Yoshinori Kuroda, Masahiro Mizumoto, Atsushi Yamashita, Shuto Hirooka, Kentaro Akabane, Mitsuaki Sadahiro (Second Department of Surgery, Yamagata University Faculty of Medicine, Yamagata, Japan)

^○Hiroto Tomita¹, Hideyuki Iwaki¹, Yoshiyuki Kobayashi¹, Kenichiro Aga¹, Humie Saito¹, Munetaka Masuda² (1.Saiseikai Yokohamashi Nanbu Hospital, 2.Yokohama City University Department of Surgery Cardiovascular Surgery)

^○Naoji Hanayama, Kenjirou Sakaki (Kantoh Rosai Hospital)

^○Kenta Zaikokuji, Akihiro Mizuno, Tatsuhito Ogawa, Jien Saito (Nagoya City East Medical Center)