1) Division of Hepato-biliary-pancreatic and Transplant Surgery, Asahikawa Medical University, Asahikawa, Japan
2) Division of Vascular Surgery, Asahikawa Medical University, Asahikawa, Japan
3) Division of Gastrointestinal Surgery, Asahikawa Medical University, Asahikawa, Japan
4) Division of Cardiac Surgery, Asahikawa Medical University, Asahikawa, Japan
5) Division of Pediatric Surgery, Asahikawa Medical University, Asahikawa, Japan
6) Center of Breast and Respiratory Surgery, Asahikawa Medical University, Asahikawa, Japan

Hiroyuki Furukawa¹⁾, Nobuyoshi Azuma²⁾, Yasuo Sumi³⁾, Hiroyuki Kamiya⁴⁾, Kazutoshi Miyamoto⁵⁾, Masahiro Kitada⁶⁾, Naoto Matsuno¹⁾, Satoshi Hirata⁶⁾, Hideki Yokoo¹⁾, Yukihiro Saito²⁾, Atsuhiro Koya²⁾, Kimihiro Hasegawa³⁾, Natsuya Ishikawa⁴⁾, Kouji Imai¹⁾, Masatoshi Hirasawa⁵⁾, Tatsuya Syonaka³⁾, Hisayuki Miyagi⁵⁾, Daiki Uchida²⁾