1. Urology Service; Department of Surgery; Memorial Sloan Kettering Cancer Center; New York NY USA
2. Department of Urology; Juntendo University; Graduate School of Medicine; Tokyo Japan
3. Department of Urology; St. Luke's International Hospital; Tokyo Japan
4. Department of Epidemiology and Biostatistics; Memorial Sloan-Memorial Sloan Kettering Cancer Center; New York NY USA
5. Department of Radiology; Memorial Sloan-Memorial Sloan Kettering Cancer Center; New York NY USA