[1] Natl Canc Ctr, JCOG Data Ctr, Operat Off, Multiinst Clin Trial Support Ctr, Tokyo 104, Japan
[2] Natl Canc Ctr, Gastrointestinal Med Oncol Div, Tokyo 1040045, Japan
[3] Natl Canc Ctr, Esophageal Surg Div, Tokyo 1040045, Japan
[4] Natl Canc Ctr, Dept Radiat Oncol, Tokyo 1040045, Japan
[5] Ichikawa Gen Hosp, Dept Surg, Tokyo Dent Coll, Chiba, Japan
[6] Toranomon Gen Hosp, Dept Surg Gastroenterol, Tokyo, Japan
[7] Shizuoka Canc Ctr, Div Esophageal Surg, Shizuoka, Japan
[8] Natl Canc Ctr Hosp East, Dept Esophageal Surg, Chiba, Japan
[9] Chiba Canc Ctr, Clin Trial Promot Dept, Chiba 2608717, Japan
[10] Keio Univ, Sch Med, Dept Surg, Tokyo 160, Japan