Affiliation: | 1. Department of Radiation Oncology, , Boston, Massachusetts;2. Massachusetts General Hospital, , Boston, Massachusetts;3. University of Southern California Keck School of Medicine, , Los Angeles, California;4. Department of Biostatistics and Biomathematics, , Boston, Massachusetts;5. Department of Pathology, , Boston, Massachusetts;6. Brigham and Women's Hospital and Dana‐Farber Cancer Institute, , Boston, Massachusetts;7. Department of Surgery, , Boston, Massachusetts |