[1] Kurume Univ, Sch Med, Kurume, Fukuoka 830, Japan
[2] Aichi Canc Ctr, Res Inst, Nagoya, Aichi 464, Japan
[3] Nagoya Univ, Grad Sch Med, Nagoya, Aichi 4648601, Japan
[4] Univ Barcelona, Inst Invest Biomed August Pi & Sunyer IDIBAPS, Hosp Clin, Pathol Lab, Barcelona, Spain
[5] Kyoto Univ, Grad Sch Med, Kyoto, Japan
[6] Natl Canc Ctr, Tokyo, Japan
[7] East Hosp, Natl Canc Ctr, Kashiwa, Chiba, Japan