1) Department of Cardiovascular Surgery, Tohoku University
2) Department of Cardiothoracic Surgery, Tokyo University
3) Surgical Center, Asahikawa Medical College Hospital

K Tabayashi¹⁾, S Takamoto²⁾, S Hirata³⁾, S Nakata⁴⁾, K Harii⁵⁾, N Kashimura⁶⁾, Y Isobe⁷⁾, Y Sumiyama⁸⁾, T Kitagawa⁹⁾, T Kanematsu¹⁰⁾, S Sugiura¹¹⁾, T Yamaguchi¹²⁾, N Kokudo¹³⁾, Y Matsuyama¹⁴⁾, H Koyanagi¹⁵⁾, Y Idezuki¹⁶⁾