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The clinical efficacy of gefitinib in the treatment of non-small cell lung cancer (NSCLC) with mutations in exon 18, 19 or 21 of epidermal growth factor receptor (EGFR) is limited by the acquired resistance to the drug. To explore whether X-ray irradiation could reverse the acquired gefitinib resistance in NSCLC cell in vitro. We chose a human NSCLC cell line NCI-H1975 to establish acquired gefitinib-resistant...
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