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Cytotoxicity of DOX-loaded magnetic nanocarriers and free DOX in HeLa cells with or without magnetic field after incubation for 24 h (A). (B) In control experiments, we examined cytotoxicity using magnetic nanocarriers alone with or without magnetic field after incubation for 24 h, and found no cytotoxicity. The standard deviation for each data point was averaged over four samples (n = 4) for (A,B).
