1. Department of Urology Tokyo Medical and Dental University Bunkyo‐ku Tokyo Japan
2. Department of Urology Tsuchiura Kyodo General Hospital Tsuchiura‐shi Ibaraki Japan
3. Department of Urology Soka Municipal Hospital Soka‐shi Saitama Japan
4. Department of Urology JA Toride Medical Hospital Toride‐shi Ibaraki Japan
5. Department of Urology Saitama Red Cross Hospital Saitama Japan
6. Department of Urology Dokkyo Medical University Saitama Medical Center Koshigaya‐shi Saitama Japan
7. Department of Urology Tokyo Metropolitan Cancer and Infectious Diseases Center Komagome Hospital Bunkyo‐ku Tokyo Japan
8. Department of Urology Tokyo Metropolitan Tama‐Nambu Chiiki Hospital Tama‐shi Tokyo Japan
9. Department of Urology Showa General Hospital Kodaira‐shi Tokyo Japan
10. Department of Urology Kohnodai Hospital Ichikawa‐shi Chiba Japan
11. Department of Urology Saitama Prefectural Cancer Center Kitaadachi‐gun‐Ina‐machi Saitama Japan
12. Department of Urology Tokyo Metropolitan Ohtsuka Hospital Toshima‐ku Tokyo Japan
13. Department of Urology Cancer Institute Hospital Koto‐ku Tokyo Japan
14. Department of Urology Japanese Red Cross Omori Hospital Ota‐ku Tokyo Japan