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Kaplan–Meier analysis of recurrence-free survival (RFS) and overall survival (OS) by the score. The score was defined as follows: low, DFI of >24 months and no chromosome 8q surgain; intermediate, either a DFI of ≤24 months or chromosome 8q surgain; or high, DFI of ≤24 months and chromosome 8q surgain. HR: hazard ratio; CI: confidence interval.
