1. Department of Urology, New York University Medical Center, Memorial Sloan-Kettering Cancer Center, New York, New York
2. Departments of Epidemiology and Biostatistics, Memorial Sloan-Kettering Cancer Center, New York, New York
3. Division of Nephrology, Department of Medicine, Tufts-New England Medical Center, Boston, Massachusetts
4. Division of Urology, Department of Surgery, Memorial Sloan-Kettering Cancer Center, New York, New York