Reply to O. Saifi et al

James B Yu¹, David M DeStephano¹, David P Horowitz¹+2

• ¹James B. Yu, MD, MHS, Cancer Outcomes, Public Policy, and Effectiveness Research (COPPER) Center at Yale, New Haven, CT, Department of Radiation Oncology, St Francis Hospital, Hartford, CT; David M. DeStephano, MPH and David P. Horowitz, MD, Department of Radiation Oncology, Columbia University Irving Medical Center, New York, NY; Cary P. Gross, MD, Cancer Outcomes, Public Policy, and Effectiveness Research (COPPER) Center at Yale, New Haven, CT, Department of Internal Medicine and Primary Care, Yale School of Medicine, New Haven, CT; and Simon K. Cheng, MD, PhD, Department of Radiation Oncology, Columbia University Irving Medical Center, New York, NY.