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The viability of A549/GR and A549 cells decreased as concentrations of gerfitinib increased in the culture medium. The half maximal inhibitory concentration value of gerfitinib for A549/GR cells was 48.05±4.33 µmol/l, which is significantly greater than that of the A549 cells (8.02±0.63 µmol/l; P<0.01).
