1 Derya Tilki, MD, Martini-Klinik Prostate Cancer Center, University Hospital-Hamburg-Eppendorf, Hamburg, Germany, Department of Urology, University Hospital Hamburg-Eppendorf, Hamburg, Germany, Department of Urology, Koc University Hospital, Istanbul, Turkey; Ming-Hui Chen, PhD, Department of Statistics, University of Connecticut, Storrs, CT; and Anthony V. D'Amico, MD, PhD, Department of Radiation Oncology, Brigham and Women's Hospital and Dana Farber Cancer Institute, Boston, MA.