1. Department of Urology, Seoul National University Hospital, Seoul, Korea.
2. Department of Urology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
3. Department of Urology, Chonnam National University Medical School, Gwangju, Korea.
4. Department of Urology, Korea University Ansan Hospital, Korea University College of Medicine, Ansan, Korea.
5. Department of Urology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
6. Department of Urology, Seoul National University Bundang Hospital, Seongnam, Korea.
7. Department of Urology, College of Medicine, The Catholic University of Korea, Seoul, Korea.
8. Department of Urology, National Cancer Center, Goyang, Korea.