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Kaplan-Meier curves for association between treatment arm (intention-to-treat analyses) and overall survival (OS) according to PTGS2 expression and estrogen receptor (ER) status: (A) PTGS2-low population; (B) PTGS2-low/ER-negative subpopulation; (C) PTGS2-low/ER-positive subpopulation; (D) PTGS2-high population; (E) PTGS2-high/ER-negative subpopulation; and (F) PTGS2-high/ER-positive subpopulation. HR, hazard ratio.
