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Survival estimates of event-free survival in neuroblastoma patients. Kaplan-Meier plots of favorable and unfavorable risk score groups based on the (A) median risk score of the discovery cohort, (B) first quartile risk score of the independent cohort 1, (C) first quartile risk score of the independent cohort 2, (D) median risk score of the independent cohort 3. The P values were obtained using a Mantel log-rank test (two-sided). lncRNA = long noncoding RNA.
