1. Department of Urology , Faculty of Life Sciences, , Kumamoto, Kumamoto , Japan
2. Kumamoto University , Faculty of Life Sciences, , Kumamoto, Kumamoto , Japan
3. Department of Urology, Chubu Tokushukai Hospital , Kitanakagusuku, Okinawa , Japan
4. Department of Urology , School of Medicine, , Kitakyushu, Fukuoka , Japan
5. University of Occupational and Environmental Health , School of Medicine, , Kitakyushu, Fukuoka , Japan
6. Department of Urology , Faculty of Medicine, , Saga, Saga , Japan
7. Saga University , Faculty of Medicine, , Saga, Saga , Japan
8. Department of Urology , Faculty of Medicine, , Yufu, Oita , Japan
9. Oita University , Faculty of Medicine, , Yufu, Oita , Japan
10. Department of Urology , Faculty of Medicine, , Kagoshima, Kagoshima , Japan
11. Kagoshima University , Faculty of Medicine, , Kagoshima, Kagoshima , Japan
12. Department of Urology , Faculty of Medicine, , Miyazaki, Miyazaki , Japan
13. University of Miyazaki , Faculty of Medicine, , Miyazaki, Miyazaki , Japan
14. Department of Urology, Kurume University School of Medicine , Kurume, Fukuoka , Japan
15. Department of Urology, Kitakyushu Municipal Medical Center , Kitakyushu, Fukuoka , Japan
16. Department of Urology , Faculty of Medicine, , Fukuoka, Fukuoka , Japan
17. Fukuoka University , Faculty of Medicine, , Fukuoka, Fukuoka , Japan
18. Department of Urology, Nagasaki University Graduate School of Biomedical Sciences , Nagasaki, Nagasaki , Japan
19. Department of Urology, Fukuoka University Chikushi Hospital , Chikushino, Fukuoka , Japan
20. Department of Urology , Graduate School of Medical Sciences, , Fukuoka, Fukuoka , Japan
21. Kyushu University , Graduate School of Medical Sciences, , Fukuoka, Fukuoka , Japan
22. Department of Urology , Graduate School of Medicine, , Nishihara, Okinawa , Japan
23. University of the Ryukyus , Graduate School of Medicine, , Nishihara, Okinawa , Japan