1. Department of Urology, Prostate Cancer Center, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea.
2. Department of Pathology, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea.
3. Department of Urology, Urological Science Institute, Yonsei University College of Medicine, Seoul, Korea.
4. Center of Evidence Based Medicine, Institute of Convergence Science, Yonsei University, Seoul, Korea.