1) Department of Surgery, School of Medicine, Keio University, Tokyo, Japan
2) Department of Surgery, Shonan Keiiku Hospital, Fujisawa, Japan

Shutaro Hori¹⁾, Yutaka Nakano¹⁾, Shinpei Matsui¹⁾, Masayuki Tanaka¹⁾, Satoru Matsuda¹⁾, Aiko Nagayama¹⁾, Ryo Seishima¹⁾, Tomoko Seki¹⁾, Masayuki Irino¹⁾, Kentaro Matsubara¹⁾, Maiko Takahashi¹⁾, Hiroshi Yagi¹⁾, Yuta Abe¹⁾, Tetsu Hayashida¹⁾, Koji Okabayashi¹⁾, Minoru Kitago¹⁾, Hirohumi Kawakubo¹⁾, Hideaki Obara¹⁾, Norihito Wada²⁾, Yuko Kitagawa¹⁾