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EGFR expression is upregulated in A549 cells. (A) EGFR protein expression in lung cancer and normal adjacent tissue specimens, as assessed using immunohistochemical analysis. Magnification, ×10. (B) EGFR mRNA expression in lung cancer and normal adjacent tissue specimens, as assessed using reverse transcription-quantitative polymerase chain reaction. ##P<0.01 vs. normal adjacent tissue specimens. EGFR, epidermal growth factor receptor.
