[1] Natl Canc Ctr, Operat Off, JCOG Data Ctr, Tokyo, Japan
[2] Teikyo Univ Hosp, Dept Surg, Tokyo, Japan
[3] Natl Canc Ctr, Gastr Surg Div, Tokyo, Japan
[4] Toranomon Gen Hosp, Dept Gastroenterol Surg, Tokyo, Japan
[5] Gifu Municipal Hosp, Dept Surg, Gifu, Japan
[6] Shizuoka Prefectural Gen Hosp, Dept Gastroenterol Surg, Shizuoka, Japan
[7] Yao Municipal Hosp, Surg Div, Osaka, Japan
[8] Tenri Hosp, Dept Digest Surg, Nara, Japan
[9] Tochigi Canc Ctr, Dept Surg, Utsunomiya, Tochigi, Japan
[10] Hiroshima City Asa Hosp, Dept Surg, Hiroshima, Japan
[11] Tokyo Metropolitan Bokutoh Hosp, Dept Surg, Tokyo, Japan
[12] Nagoya Univ, Grad Sch Med, Dept Gastroenterol Surg, Nagoya, Aichi, Japan
[13] Natl Canc Ctr Hosp East, Gastr Surg Div, Chiba, Japan
[14] Natl Canc Ctr, Gastrointesitnal Med Oncl, Tokyo, Japan
[15] Japanese Fdn Canc Res, Canc Inst Hosp, Dept Gastroenterol Surg, Tokyo, Japan
[16] Yodogawa Chrisitan Hosp, Dept Surg, Osaka, Hyogo, Japan
[17] Shizuoka Canc Ctr, Dept Gastr Surg, Shizuoka, Japan