[1] Natl Canc Ctr Hosp East, Natl Canc Ctr Kashiwa, Div Pathol, Res Ctr Innovat Oncol, Kashiwa, Chiba 2778577, Japan
[2] Niigata Canc Ctr Hosp, Dept Digest Surg, Chuou Ku, Niigata 9518566, Japan
[3] Natl Canc Ctr Hosp East, Dept Surg Oncol, Kashiwa, Chiba 2778577, Japan
[4] Hiroshima Univ, Dept Mol Pathol, Inst Biomed & Hlth Sci, Minami Ku, Hiroshima 7348551, Japan