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Expression of connexin 43 (Cx43) improves the overall survival of patients with epidermal growth factor receptor (EGFR)‐expressing glioblastoma. Kaplan–Meier survival curves of overall survival duration were produced according to EGFR amplification and Cx43 expression in glioblastoma patients in The Cancer Genome Atlas cohort (n = 540). Statistical significance between two groups was evaluated using the log–rank test
