1. Department of Urology, St. Vincent’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea.
2. Department of Urology, Bucheon St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea.
3. Department of Urology, Uijeongbu St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea.
4. Department of Urology, Gwangju Veterans Hospital, Gwangju, Korea.
5. Department of Urology, Inje University Ilsan Paik Hospital, Inje University College of Medicine, Goyang, Korea.
6. Department of Urology, Daegu Catholic University Medical Center, Daegu, Korea.
7. Department of Urology, Chonnam National University Medical School, Hwasun, Korea.
8. Department of Urology, Yeungnam University College of Medicine, Daegu, Korea.
9. Department of Urology, Dankook University College of Medicine, Cheonan, Korea.