1) Department of Hepato-Biliary-Pancreatic Surgery, Osaka City University Hospital, Osaka, Japan
2) Department of Gastroenterological Surgery, Osaka City University Hospital, Osaka, Japan
3) Department of Thoracic Surgery, Osaka City University Hospital, Osaka, Japan
4) Department of Breast and Endocrine Surgery, Osaka City University Hospital, Osaka, Japan
5) Pediatric Surgery, Osaka City University Hospital, Osaka, Japan
6) Department of Cardiovascular Surgery, Osaka City University Hospital, Osaka, Japan
7) Department of Pediatric Surgery, Osaka Red Cross Hospital, Osaka, Japan

Shogo Tanaka¹⁾, Ryosuke Amano¹⁾, Masaichi Ohira²⁾, Shoji Kubo¹⁾, Noritoshi Nishiyama³⁾, Naoyoshi Onoda⁴⁾, Masaki Horiike⁵⁾, Kazuya Muguruma²⁾, Shigeru Lee²⁾, Hiroaki Tanaka²⁾, Hiromichi Fujii⁶⁾, Kenjiro Kimura¹⁾, Hisashi Nagahara²⁾, Koichi Ohno⁷⁾, Toshihiko Shibata⁶⁾