[1] Univ Toronto, Sunnybrook Hlth Sci Ctr, Dept Urol, Toronto, ON, Canada
[2] Univ Calgary, Foothills Med Ctr, Dept Obstet & Gynecol, Calgary, AB, Canada
[3] Cook MyoSite, Pittsburgh, PA USA
[4] William Beaumont Hosp, Dept Urol, Royal Oak, MI 48072 USA