1. Department of Uro-Oncology, Saitama Medical University International Medical Center, Saitama, Japan
2. Department of Radiation Oncology, Saitama Medical University International Medical Center, Saitama, Japan
3. Department of Radiology, Shinkuki General Hospital, Saitama, Japan
4. Community Health Science Center, Saitama Medical University, Saitama, Japan
5. Department of Urology, Keio University School of Medicine, Tokyo, Japan