[1] Japanese Fdn Canc Res, Canc Inst Hosp, Koto Ku, Tokyo, Japan
[2] Natl Canc Ctr, Japan Clin Oncol Grp, Operat Off, Data Ctr, Chuo Ku, Tokyo, Japan
[3] Japanese Fdn Canc Res, Tokyo, Japan
[4] Natl Canc Ctr Hosp East, Dept Gastroenterol & Gastrointestinal Oncol, Translat Res Support Off, Kashiwa, Japan
[5] Osaka Univ, Suita, Japan
[6] Univ Tokyo, IMSUT Hosp, Inst Med Sci, Minato City, Tokyo, Japan
[7] Shizuoka Canc Ctr, Div Gastr Surg, Nagaizumi, Shizuoka, Japan
[8] Natl Canc Ctr, JCOG Data Ctr, Tokyo, Japan
[9] Natl Canc Ctr, Dept Gastr Surg, Tokyo, Japan