[1] Aichi Canc Ctr Hosp, Dept Surg Gastroenterol, Aichi, Japan
[2] Aichi Med Univ, Dept Surg, Aichi, Japan
[3] Ogaki Municipal Hosp, Gifu, Japan
[4] Nagoya City Univ, Grad Sch Med Sci, Aichi, Japan
[5] Nagoya City Univ, Grad Sch Med Sci, Aichi, Japan
[6] Nagoya City Univ, Grad Sch Med Sci, Aichi, Japan
[7] Nagoya Univ, Dept Surg 1, Aichi, Japan
[8] Kyoto Univ, Dept Epidemiol, Clin Res Informat Management, Kyoto, Japan
[9] Nagoya Univ, Dept Surg 2, Aichi, Japan