Preoperative radiation dose escalation for rectal cancer using a concomitant boost strategy improves tumor downstaging without increasing toxicity: A matched-pair analysis by Jillian R. Gunther, MD, PhD, Awalpreet S. Chadha, MD, Ui Sup Shin, MD, In Ja Park, MD, Kiran V. Kattepogu, MD, Jonathan D. Grant, MD, David C. Weksberg, MD, PhD, Cathy Eng, MD, Scott E. Kopetz, MD, PhD, Prajnan Das, MD, MS, MPH, Marc E. Delclos, MD, Harmeet Kaur, MD, Dipen M. Maru, MD, John M. Skibber, MD, Miguel A. Rodriguez-Bigas, MD, Y. Nancy You, MD, Sunil Krishnan, MD, George J. Chang, MD, MS

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