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Prussian blue micrographs (×200) of tumor sections, heart, kidney, and liver from PBS, free DOX, DOX@IONPs, FA-DOX@IONPs, DOX@IONPs plus magnetic treatment, and FA-DOX@IONPs plus magnetic treatment groups on day 24. Scale bars =50 μm.
Abbreviations: DOX, doxorubicin; FA, folic acid; IONP, iron oxide nanoparticle.
