1) Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Japan
2) Department of Surgery and Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
3) Department of Gastroenterological Surgery, School of Medicine, Toho University, Tokyo, Japan
4) Gastroenterological Surgery Division, Yokohama City University School of Medicine, Yokohama, Japan
5) Department of Gastroenterological Surgery, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan

Masaki Mori¹⁾²⁾, Norikatsu Miyoshi¹⁾, Hideaki Shimada³⁾, Itaru Endo⁴⁾, Yasuyuki Seto⁵⁾