Fig. 7From: Co-delivery of Gefitinib and chloroquine by chitosan nanoparticles for overcoming the drug acquired resistanceIntracellular ATP level assay after 48 h incubation with different Gefitinib formulations, respectively. Results were expressed as mean ± SD (n = 3). a QGY cells, b QGY/Gefitinib cellsBack to article page