Error in Kaplan-Meier Curves

In the Original Investigation titled "Proton Beam Radiotherapy and Concurrent Chemotherapy for Unresectable Stage III Non–Small Cell Lung Cancer: Final Results of a Phase 2 Study," published online July 20, 2017, there were errors in Figure 2a in the Kaplan-Meier curves. This article was previously corrected in September 2017 to fix the numbers at risk in Figure 2a. This article was corrected online.

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