1. Division of Urology, Department of Surgery, University Health Network, University of Toronto, Toronto, Ontario, Canada
2. Brady Department of Urology, Weill Cornell Medical College, New York, New York
3. Department of Epidemiology and Biostatistics, Memorial Sloan-Kettering Cancer Center, New York, New York
4. Urology Service, Department of Surgery, Memorial Sloan-Kettering Cancer Center, New York, New York