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Immunofluorescence staining of A) aldehyde Fe3O4-dextran-anti-β-HCG nanoparticles, B) anti-β-HCG antibody, and C) nonaldehyde Fe3O4-dextran-anti-β-HCG nanoparticle.
Abbreviations: Fe3O4, magnetic iron oxide; HCG, human chorionic gonadotropin.
