[1] Kobe Univ, Grad Sch Med, Div Gastrointestinal Surg, Kobe, Hyogo, Japan
[2] Kobe Univ, Grad Sch Med, Div Mol & Cellular Biol, Kobe, Hyogo, Japan
[3] Kobe Univ, Grad Sch Med, Div Med Oncol Hematol, Kobe, Hyogo, Japan
[4] Kobe Univ Hosp, Ctr Canc, Kobe, Hyogo, Japan