1. Department of Urology, Nara Medical University, Kashihara 634-8522, Nara, Japan
2. Department of Urology, Nara Prefectural Seiwa Medical Center, Ikoma 636-0802, Nara, Japan
3. Department of Urology, Yamatotakada Municipal Hospital, Yamatotakada 635-8501, Nara, Japan
4. Department of Urology, Takai Hospital, Tenri 632-0006, Nara, Japan
5. Department of Urology, Saiseikai Chuwa Hospital, Sakurai 633-0054, Nara, Japan
6. Department of Urology, Matsusaka Chuo General Hospital, Matsusaka 515-0818, Mie, Japan
7. Department of Urology, Tane General Hospital, Osaka 550-0025, Osaka, Japan
8. Department of Urology, Nara City Hospital, Nara 630-8305, Nara, Japan
9. Department of Urology, Nara Prefecture General Medical Center, Nara 630-8054, Nara, Japan