[1] Sano Hosp, Gastrointestinal Canc Ctr, Kobe, Japan
[2] Natl Canc Ctr Hosp East, Dept Gastroenterol & Gastrointestinal Oncol, Kashiwa, Japan
[3] Kochi Med Sch, Dept Med Oncol, Nankoku, Japan
[4] Natl Canc Ctr Hosp East, Kashiwa, Japan
[5] Saitama Med Univ, Int Med Ctr, Hidaka, Japan
[6] Kanagawa Canc Ctr, Dept Gastrointestinal Surg, Yokohama, Japan
[7] Aichi Canc Ctr Hosp, Dept Clin Oncol, Nagoya, Japan
[8] Kobe City Med Ctr Gen Hosp, Dept Med Oncol, Kobe, Japan
[9] Osaka Gen Med Ctr, Dept Gastroenterol Surg, Osaka, Japan
[10] Kyushu Univ, Grad Sch Med Sci, Dept Surg & Sci, Fukuoka, Japan
[11] Univ Tsukuba, Dept Gastroenterol, Fac Med, Tsukuba, Japan
[12] Kindai Univ, Fac Med, Osakasayama, Japan
[13] Kansai Med Univ, Hirakata, Japan
[14] Hokkaido Univ Hosp, Div Canc Ctr, Sapporo, Japan
[15] Shizuoka Canc Ctr, Div Gastrointestinal Oncol, Shizuoka, Japan
[16] Shizuoka Canc Ctr, Dept Gastrointestinal Oncol, Shizuoka, Japan
[17] Natl Canc Ctr Hosp East, Dept Data Sci, Kashiwa, Japan
[18] Osaka Natl Hosp, Natl Hosp Org, Dept Surg, Osaka, Japan