1. Institute for Evidence-based Medicine; College of Medicine; Korea University; Seoul Korea
2. Department of Urology; Cheil General Hospital; Dankook University College of Medicine; Seoul Korea
3. Department of Urology; Yonsei University Wonju College of Medicine; Wonju Korea
4. Center for Health Promotion; Samsung Medical Center; Sungkyunkwan University School of Medicine; Seoul Korea
5. Department of Urology; Mizmedi Hospital; Seoul Korea
6. Department of Urology; CHA Gangnam Medical Center; CHA University; Seoul Korea