1. Department of Urology, Chonnam National University Hwasun Hospital, Chonnam National University Medical School, Hwasun, Korea.
2. Department of Urology, Daegu Catholic University School of Medicine, Daegu, Korea.
3. Department of Preventive Medicine, College of Medicine, Chosun University, Gwangju, Korea.
4. Yonsei Wonju Medical Library, Yonsei University Wonju College of Medicine, Wonju, Korea.
5. Department of Urology, College of Medicine, Hallym University, Seoul, Korea.
6. Department of Urology, Kwangju Christian Hospital, Gwangju, Korea.
7. Department of Urology, Konkuk University Medical Center, Konkuk University School of Medicine, Seoul, Korea.
8. Department of Urology, Inje University College of Medicine, Seoul, Korea.
9. Department of Urology, Yonsei University Wonju College of Medicine, Wonju, Korea.
10. Center of Evidence Based Medicine, Institute of Convergence Science, Yonsei University, Seoul, Korea.