1. Department of Urology, Matsue Red Cross Hospital, Matsue 690-8506, Japan
2. Division of Urology, Department of Surgery, Faculty of Medicine, Tottori University, Yonago 683-8504, Japan
3. Department of Urology, Tottori Prefectural Central Hospital, Tottori 680-0901, Japan
4. Department of Urology, Yonago Medical Center, Yonago 683-0006, Japan
5. Department of Urology, Hamada Medical Center, Hamada 697-8511, Japan
6. Department of Urology, Tottori Red Cross Hospital, Tottori 680-8517, Japan
7. Department of Urology, Matsue City Hospital, Matsue 690-8509, Japan
8. Department of Urology, Sanin Rosai Hospital, Yonago 683-8605, Japan