1. Department of Urology, National Kyushu Cancer Center, Fukuoka, Fukuoka 811‑1395, Japan
2. Department of Pathology, National Kyushu Cancer Center, Fukuoka, Fukuoka 811‑1395, Japan
3. Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka, Fukuoka 811‑1395, Japan