1. Department of Urologic Surgery, Vanderbilt University School of Medicine, Nashville, Tennessee
2. Department of Statistics, University of California-Davis, Sacramento, California
3. Department of Urology, University of California-Los Angeles, Los Angeles, California
4. Division of Urology, Department of Surgery, Bassett Healthcare, Cooperstown, New York
5. Department of Urology, University of California-Davis, Sacramento, California
6. Division of Urology, Department of Surgery, Oregon Health and Sciences University, Portland, Oregon