1. Department of Urology; Tohoku University Graduate School of Medicine; Sendai Japan
2. Tohoku Urological Evidence-Based Medicine Study Group; Japan
3. Department of Urology; Miyagi Cancer Center; Natori Japan
4. Department of Urology; Tohoku Rosai Hospital; Sendai Japan
5. Department of Urology; Hachinohe City Hospital; Hachinohe Japan
6. Department of Urology; Japan Community Health Care Organization Sendai Hospital; Sendai Japan