1. Division of Urologic Surgery, Washington University School of Medicine in St. Louis, Siteman Cancer Center, St. Louis, Missouri;
2. Division of Urology, Department of Surgery, University of Toronto, Toronto M5G 2M9, Ontario, Canada;
3. Surgery Section, Durham VA Medical Center, Durham, North Carolina 27710
4. Duke Prostate Center, Division of Urology, Department of Surgery, Duke University School of Medicine, Durham, North Carolina 27710
5. Department of Pathology, Duke University School of Medicine, Durham, North Carolina 27710;