1. Division of Urology, St Michael's Hospital, University of Toronto, Toronto, Ontario, Canada.
2. Department of Urology, UCI Medical Center, University of California, Irvine, Orange, California.
3. Department of Urology, Mayo Clinic, Mayo Clinic College of Medicine, Rochester, Minnesota.
4. Department of Urology, UM Medical Center, University of Minnesota, Minneapolis, Minnesota.
5. Department of Urology, University Hospital, Indiana University School of Medicine, Indianapolis, Indiana.
6. Department of Surgery, University of Montreal Hospital Centre, University of Montreal, Montreal, Quebec, Canada.