1. Division of Urology; Department of Surgery; University of Toronto; Toronto ON Canada
2. Institute for Clinical Evaluative Sciences; Toronto ON, Canada
3. Division of Urology; Department of Surgery; St. Joseph's Health Care; Western University; London ON Canada
4. Department of Epidemiology and Biostatistics; Schulich School of Medicine and Dentistry; Western University; London ON Canada
5. Division of Urology; St. Michael's Hospital; Toronto ON Canada