1. From the Department of Medical Oncology, University Hospital Dijkzigt, Rotterdam
2. Department of Statistics, Netherlands Cancer Institute, Amsterdam, The Netherlands
3. European Organization for Research on Treatment of Cancer Data Center, Brussels and University Hospital Middelheim, Antwerp, Belgium
4. Genitourinary Oncology Service, Division of Solid Tumor Oncology, Department of Medicine and Urology Service, Memorial Sloan-Kettering Cancer Center, and Department of Medicine, Cornell University Medical College, New York, New York
5. The Cleveland Clinic Foundation, Cleveland, Ohio