[1] Univ Utah, Dept Surg Urol, Salt Lake City, UT USA
[2] Univ Utah, Dept Internal Med, Div Epidemiol & Biostat, Salt Lake City, UT 84112 USA
[3] Univ Utah, Dept Phys Med & Rehabil, Salt Lake City, UT 84112 USA
[4] Salt Lake City Vet Med Ctr, Dept Phys Med & Rehabil, Salt Lake City, UT USA
[5] Univ Michigan, Dept Urol, Ann Arbor, MI 48109 USA
[6] Univ Minnesota, Minneapolis, MN USA
[7] Western Univ, London, ON, Canada