[1] Natl Canc Ctr, Res Inst, Div Cellular Signaling, Tokyo, Japan
[2] Natl Canc Ctr, Res Inst, Dept Translat Oncol, Tokyo, Japan
[3] Natl Canc Ctr, Dept Diagnost Pathol, Tokyo, Japan
[4] Kanamecho Hosp, Tokyo, Japan
[5] Natl Canc Ctr, Dept Lab Med, Tokyo, Japan
[6] Natl Canc Ctr, Div Gastrointestinal Med Oncol, Tokyo, Japan