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Age distribution in EGFR amplification status in primary GBM. A and D, No significant difference was observed across age groups between amplification and wildtype EGFR status in CGGA and TCGA databases. An unpaired t test was used in the differential analysis. B, C, E and F, Kaplan‐Meier survival analysis for EGFR amplification status in GBM. The log‐rank test was used in survival analysis
