1 Division of Urology, Department of Surgery, University of Utah, Salt Lake City, UT, USA.
2 Department of Urology, University of California San Diego, La Jolla, CA, USA.
3 Urological Associates of Southern Arizona, Tucson, AZ, USA.
4 Department of Urology, University of California Irvine, Orange, CA, USA.
5 Epidemiology Branch, Division of Intramural Population Health Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, USA.
6 Sexual & Reproductive Medicine Program, Urology Service, Memorial Sloan Kettering Cancer Center, NY, NY, USA.
7 Division of Urology, Department of Surgery, University of Utah, Salt Lake City, UT, USA. Electronic address: jim.hotaling@hsc.utah.edu.