Fig. 5From: Co-delivery of Gefitinib and chloroquine by chitosan nanoparticles for overcoming the drug acquired resistanceCell apoptosis determined by Annexin V-FITC staining. Flow cytometer analysis of the apoptosis and necrosis cells after 48 h incubation with the free Gefitinib, Gefitinib loaded NPs and Gefitinib/CQ-NPs, respectively. Results were expressed as mean ± SD (n = 3). a QGY cells, b QGY/Gefitinib cellsBack to article page