[1] Geisinger, Dept Urol, 100 N Acad Ave,Mail Code 01-27, Danville, PA 17822 USA
[2] Geisinger, Dept Populat Hlth Sci, Danville, PA USA
[3] Amer Urol Assoc, Data Management & Stat Anal, Linthicum, MD USA
[4] Univ N Carolina, Dept Urol, Chapel Hill, NC USA
[5] UNC Fertil, Raleigh, NC USA
[6] United Urol Grp Affiliate, Colorado Urol, Denver, CO USA
[7] NYU Grossman Sch Med, Dept Urol, New York, NY USA
[8] NYU Grossman Sch Med, Dept Radiol, New York, NY USA
[9] Johns Hopkins Med Inst, Dept Urol, Baltimore, MD USA
[10] Milton S Hershey Med Ctr, Penn State Hlth, Dept Urol, Hershey, PA 17033 USA