1. Department of Urology, Inha University College of Medicine, Incheon, Korea
2. Department of Urology, Gangnam Severance Hospital, Urological Science Institute, Yonsei University College of Medicine, Seoul, Korea
3. Department of Urology, Suncheon Medical Center, Suncheon, Korea
4. Department of Urology, Wonkwang University Sanbon Hospital, Wonkwang University College of Medicine, Gunpo, Korea
5. Department of Urology, Soonchunhyang University Hospital, Soonchunhyang University College of Medicine, Seoul, Korea
6. Department of Urology, Severance Hospital, Urological Science Institute, Yonsei University College of Medicine, Seoul, Korea
7. Center of Evidence Based Medicine, Institute of Convergence Science, Yonsei University, Seoul, Korea