1. Department of Urology, Nagoya University Graduate School of Medicine, Nagoya, Japan
2. Department of Urology, Handa Municipal Hospital, Handa, Japan
3. Department of Urology, Miyoshi Municipal Hospital, Miyoshi, Japan
4. Department of Urology, Tosei Hospital, Seto, Japan
5. Ototokiyama Urology Clinic, Nagoya, Japan
6. Narita-Clinic, Nagoya, Japan
7. Department of Urology, Tsushima Municipal Hospital, Tsushima, Japan