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Morphology of the cytoskeleton and nuclei in MG-63 cells: (A) control; (B) exposed to the highest concentration of Fe3O4; (C) exposed to the highest concentration of Fe3O4@GEM and (D) exposed to the highest concentration of GEM, at 24 h (0.03 mg/mL equivalent concentration of GEM). The cytoskeleton and nuclei were stained with red X-phalloidin and Hoechst.
