Affiliation: | 1. Harvard Radiation Oncology Program, Harvard Medical School, , Boston, Massachusetts;2. Department of Statistics, University of Connecticut, , Storrs, Connecticut;3. Department of Applied Mathematics and Statistics, University of S?o Paulo, , S?o Paulo, Brazil;4. Department of Medical Oncology and Radiation Oncology, Dana‐Farber Cancer Institute and Brigham and Women's Hospital, , Boston, Massachusetts |