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"Overactive epidermal growth factor receptor (EGFR) signaling has been linked to the development of cancer. Several drug therapies have been developed to treat these EGFR-associated cancers; however, many patients have developed resistance to these drugs and are therefore no longer responsive to drug treatment. "^^<http://www.w3.org/2001/XMLSchema#string>
<http://medicalxpress.com/news/2012-06-combination-drug-resistance-cancer.html>