1. University of Minnesota Medical School; University of Minnesota; Minneapolis Minnesota USA
2. Department of Nephrology and Hypertension; University Medical Center Utrecht; Utrecht Netherlands
3. Julius Center for Health Sciences and Primary Care; University Medical Center Utrecht, Utrecht University; Utrecht Netherlands
4. Department of Urology; University of Minnesota; Minneapolis Minnesota USA
5. Department of Urology; Chonnam National University Medical School, Chonnam National University Hwasun Hospital; Hwasun Korea, South
6. Institute of Evidence Based Medicine; Yonsei University Wonju College of Medicine; Wonju Korea, South
7. Borland Health Sciences Library; University of Florida-Jacksonville; Jacksonville Florida USA
8. Faculty of Medicine; University of Toronto; Toronto Canada
9. Department of Urology; Duke University School of Medicine; Durham North Carolina USA
10. Urology Section; Minneapolis VA Health Care System; Minneapolis Minnesota USA