Affiliation: | 1. Harvard Radiation Oncology Program, Brigham and Women's Hospital–Dana‐Farber Cancer Institute, Boston, Massachusetts;2. Department of Statistics, University of Connecticut, Storrs, Connecticut;3. Prostate Cancer Foundation of Chicago, Westmont, Illinois;4. Department of Radiation Oncology, Brigham and Women's Hospital–Dana‐Farber Cancer Institute, Boston, Massachusetts |