1. Department of Urology, Vanderbilt University Medical Center, Nashville, Tennessee
2. Department of Urology, University of Alabama at Birmingham School of Medicine and Birmingham Veterans Affairs Medical Center, Birmingham, Alabama
3. Dow Division of Health Services Research, Department of Urology, University of Michigan, Ann Arbor, Michigan
4. Division of Nephrology, Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan
5. Department of Urology, NorthShore University Health System, Chicago, Illinois