1. Department of Urology, University of Texas Southwestern Medical Center, Dallas, Texas
2. Department of Urology, University of Texas M.D. Anderson Cancer Center, Houston, Texas
3. Department of Urology, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin
4. Department of Urology, University of Muenster Medical Center, Muenster, Germany
5. Department of Urology, Mayo Medical School and Mayo Clinic, Rochester, Minnesota