1. Urology Service, Department of Surgery, Memorial Sloan Kettering Cancer Center, New York, New York
2. Division of Urology, Department of Surgery, University of Colorado School of Medicine, Aurora and Eastern Colorado Health Care System, Department of Veterans Affairs, Denver, Colorado
3. Health Outcomes Research Group, Department of Epidemiology and Biostatistics, Memorial Sloan Kettering Cancer Center, New York, New York
4. Center for Surgery and Public Health, Brigham and Women's Hospital, Boston, Massachusetts