1) Department of Surgery, Minamata City General Hospital and Medical Center, Kumamoto, Japan
2) Department of Medical Informatics and Administration Planning, Minamata City General Hospital and Medical Center, Kumamoto, Japan
3) Department of Gastroenterology and Hepatology, Minamata City General Hospital and Medical Center, Kumamoto, Japan
4) Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
5) Department of Medical Quality and Safety Management, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
6) Department of Medical Information Science, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan

Yohei Nagai¹⁾⁴⁾, Hironobu Shigaki¹⁾, Junichi Yamazawa²⁾, Tomo Horinouchi¹⁾⁴⁾, Rei Narita³⁾, Michio Abe¹⁾, Fudeo Sakamoto¹⁾, Kenichi Nakamura⁴⁾, Tasuku Toihata⁴⁾, Kojiro Eto⁴⁾, Akira Chikamoto⁴⁾⁵⁾, Koichiro Usuku⁶⁾, Hideo Baba⁴⁾