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Kaplan–Meier analysis of the survival of glioblastoma (GBM) patients according to the valproic acid (VPA) treatment group. Survival plots of all GBM patients (A), newly diagnosed GBM patients (B), younger GBM patients (<65 years old) (C), and younger (<65 years old), newly diagnosed GBM patients with wild-type IDH1 and wild-type p53 (D). The p-value was calculated using the log-rank test in SPSS software.
