1. Department of Urology, Osaka University Graduate School of Medicine , Suita, Osaka , Japan
2. Department of Urology, Osaka International Cancer Institute , Osaka , Japan
3. Department of Urology, Fukushima Medical University , Fukushima , Japan
4. Department of Urology, Iwase General Hospital , Sukagawa, Fukushima , Japan
5. Department of Urology, Toyonaka Municipal Hospital , Toyonaka, Osaka , Japan
6. Department of Urology, Osaka Rosai Hospital , Sakai, Osaka , Japan
7. Department of Urology, Osaka General Medical Center , Osaka , Japan
8. Department of Urology, Hyogo Prefectural Nishinomiya Hospital , Nishinomiya, Hyogo , Japan
9. Department of Urology, National Hospital Organization Osaka National Hospital , Osaka , Japan
10. Department of Urology, Osaka Police Hospital , Osaka , Japan
11. Department of Urology, Sakai City Medical Center , Sakai, Osaka , Japan
12. Department of Urology, Kinki Central Hospital of Mutual Aid Association of Public School Teachers , Itami, Hyogo , Japan
13. Department of Urology, Higashiosaka City Medical Center , Higashiosaka, Osaka , Japan
14. Department of Urology, Minoh City Hospital , Minoh, Osaka , Japan
15. Department of Urology, Sumitomo Hospital , Osaka , Japan
16. Department of Urology, Ikeda City Hospital , Ikeda, Osaka , Japan
17. Department of Urology, Kindai University Faculty of Medicine , Osakasayama, Osaka , Japan