1. Department of Urology, Gunma University Graduate School of Medicine, Maebashi, Japan
2. Institute for Preventive Medicine, Kurosawa Hospital, Takasaki, Japan
3. Department of Urology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
4. Department of Urology, Hara-Sanshin Hospital, Fukuoka, Japan
5. Medical Information Center, Kyushu University Hospital, Fukuoka, Japan
6. Department of Urology, Dokkyo Medical University Saitama Medical Center, Koshigaya, Japan
7. Department of Urology, Kagawa University Faculty of Medicine, Kagawa, Japan
8. Japan Community Healthcare Organization Tokyo Shinjuku Medical Center, Tokyo, Japan
9. Yokohama City University, Yokohama, Japan
10. Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
11. Clinical Research Support Center Kyushu, Fukuoka, Japan