1. Department of Urology, Yonsei University Wonju College of Medicine, Wonju, Korea.
2. Institute of Evidence Based Medicine, Yonsei University Wonju College of Medicine, Wonju, Korea.
3. Yonsei Wonju Medical Library, Yonsei University Wonju College of Medicine, Wonju, Korea.
4. Department of Plastic Surgery, Yonsei University Wonju College of Medicine, Wonju, Korea.
5. Division of Gastroenterology and Hepatology, Department of Internal Medicine, Yonsei University Wonju College of Medicine, Wonju, Korea.
6. Department of Preventive Medicine, Yonsei University Wonju College of Medicine, Wonju, Korea.
7. Department of Urology, Pusan National University School of Medicine, Busan, Korea.
8. Department of Urology, Cheil General Hospital and Women's Healthcare Center, Dankook University College of Medicine, Seoul, Korea.