1. Department of Urology, Mayo Clinic, Rochester, Minnesota
2. Department of Urology, University of California, Los Angeles, California
3. Greater Los Angeles VA, Health Services Research and Development Program, Los Angeles, California
4. Department of Urology, MD Anderson Cancer Center, Houston, Texas
5. Department of Urology, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania
6. Department of Urology, University of Iowa Medical Center, Iowa City, Iowa