1. Division of Urology, St. Joseph's Health Care London and the London Health Sciences Centre, The University of Western Ontario, London, Ontario, Canada.
2. Division of Urology, St. Joseph's Health Care London and the London Health Sciences Centre, The University of Western Ontario, London, Ontario, Canada.
3. Department of Anesthesia, St. Joseph's Health Care London and the London Health Sciences Centre, The University of Western Ontario, London, Ontario, Canada.