Fig. 4From: Gefitinib-loaded DSPE-PEG2000 nanomicelles with CD133 aptamers target lung cancer stem cellsCell proliferation assay evaluated using the CCK-8 kit. a A549 CD133+. b A549 CD133−. c A431 CD133+. d A431 CD133−. Data are expressed as mean ± SD (n = 3)Back to article page