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Cellular uptake on A549 cells after applying yuanhuacine, yuanhuacine/PLGA-NPs, and yuanhuacine/MNPs at (a) different time, (b) different drug concentration, (c) different temperature, and (d) relative uptake efficiency (%) in the presence of various endocytosis inhibitors. *p < .05, **p < .01 versus control.
