[1] Osaka Univ, Dept Urol, Grad Sch Med, Suita, Osaka, Japan
[2] Natl Canc Ctr Hosp East, Dept Head & Neck Med Oncol, Kashiwa, Chiba, Japan
[3] Kyushu Univ, Grad Sch Med Sci, Dept Urol, Fukuoka, Japan
[4] Hokkaido Univ, Dept Urol, Grad Sch Med, Sapporo, Hokkaido, Japan
[5] Keio Univ, Sch Med, Dept Urol, Tokyo 108, Japan
[6] Saitama Med Univ, Dept Urooncol, Int Med Ctr, Saitama, Japan
[7] Osaka Int Canc Inst, Dept Urol, Osaka, Japan
[8] Natl Canc Ctr Hosp East, Translat Res Support Sect, Kashiwa, Chiba, Japan
[9] Natl Canc Ctr Hosp East, Dept Gastroenterol & Gastrointestinal Oncol, Kashiwa, Chiba, Japan
[10] Natl Canc Ctr Hosp East, Dept Breast & Med Oncol, Kashiwa, Chiba, Japan