1. National Evidence-based Healthcare Collaborating Agency, Seoul, Korea.
2. Department of Urology, Yonsei University Wonju College of Medicine, Wonju, Korea.
3. Center of Evidence Based Medicine, Institute of Convergence Science, Yonsei University, Seoul, Korea.
4. Department of Urology, Yonsei University College of Medicine, Seoul, Korea.
5. Department of Urology, Chonnam National University Medical School, Gwangju, Korea.
6. Department of Urology, Gangnam Sevrance Hospital, Yonsei University College of Medicine, Seoul, Korea.
7. Department of Urology, Kyung Hee University Medical Center, Seoul, Korea.
8. Department of Urology, Seoul National University Bundang Hospital, Seongnam, Korea.