1. University of Colorado Anschutz School of Medicine; Aurora CO USA
2. Department of Urology; Stritch School of Medicine; Center for Male Health; Loyola University Medical Center; Maywood IL USA
3. Department of Urology; George M. O'Brien Center of Research Excellence; University of Wisconsin-Madison; Madison WI USA
4. Department of Surgery/Urology; Rocky Mountain Regional VA Medical Center; University of Colorado Anschutz School of Medicine; Aurora CO USA