1) Department of Surgery, Japanese Red Cross Osaka Hospital, Osaka, Japan
2) Department of Gastroenterological Surgery and Oncology, Medical Research Institute Kitano Hospital, Osaka, Japan
3) Department of Surgery, Osaka Saiseikai-Noe Hospital, Osaka, Japan
4) Department of Surgery, Kansai Electric Power Hospital, Osaka, Japan
5) Department of Surgery, Hirakata Kohsai Hospital, Hirakata, Japan
6) Department of Surgery, Kishiwada City Hospital, Kishiwada, Japan
7) Department of Surgery, Yamatotakada Municipal Hospital, Yamatotakada, Japan
8) Department of Surgery, Social Medical Corporation Misugikai Satoh Hospital, Hirakata, Japan
9) Department of Surgery, Chibune General Hospital, Osaka, Japan

Akira Mori¹⁾, Hiroaki Terajima²⁾, Shuichi Ota³⁾, Izumi Komoto⁴⁾, Osamu Takeyama⁵⁾, Naoki Uyama⁶⁾, Tatsushi Kato⁷⁾, Yasuhiro Kawai⁸⁾, Seiichi Kitahama⁹⁾