1. Glickman Urological and Kidney Institute, Cleveland Clinic, Cleveland, Ohio
2. Department of Urology, Memorial Sloan-Kettering Cancer Center, New York, New York
3. Department of Epidemiology and Biostatistics, Memorial Sloan-Kettering Cancer Center, New York, New York
4. Department of Quantitative Health Sciences, Cleveland Clinic, Cleveland, Ohio
5. Department of Urology, Wayne State University, Detroit, Michigan