1. Department of Urology, Ijinkai Takeda General Hospital, Kyoto, Japan.
2. Department of Urology, National Hospital Organization Kyoto Medical Center, Kyoto, Japan.
3. Department of Urology, Hamamatsu Rosai Hospital, Hamamatsu, Japan.
4. Department of Urology, Rakuwakai Otowa Hospital, Kyoto, Japan.