1. Division of Urology, Department of Surgery University of Utah Salt Lake City Utah
2. Division of Epidemiology and Biostatistics, Department of Internal Medicine University of Utah Salt Lake City Utah
3. Department of Urology University of Michigan Ann Arbor Michigan
4. Department of Urology University of Minnesota Minneapolis Minnesota
5. Department of Surgery University of Western Ontario London Ontario Canada
6. Department of Physical Medicine and Rehabilitation University of Utah Salt Lake City Utah