1. Urology Service, Department of Surgery, Memorial Sloan-Kettering Cancer Center, New York, New York
2. Department of Urology, University Hospital Ruhr University Bochum, Marienhospital Herne, Herne, Germany
3. Department of Epidemiology and Biostatistics, Memorial Sloan-Kettering Cancer Center, New York, New York
4. Department of Urology, Weill Medical College of Cornell University, New York, New York