1. Department of Radiation Oncology, Gifu Takayama Red Cross Hospital, 3-11, Tenmancho, Takayama City 500-8717, Gifu, Japan
2. Department of Radiology, Gifu University Hospital, 1-1, Yanagido, Gifu City 500-1194, Gifu, Japan
3. Department of Urology, Gifu University Hospital, 1-1, Yanagido, Gifu City 500-1194, Gifu, Japan
4. Department of Urology, Gifu Prefectural General Medical Center, 4-6-1, Noisshiki, Gifu City 500-8717, Gifu, Japan