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In vivo biocompatibility studies of Mn3O4@PEG-Cy7.5 NPs in healthy mice. Hematoxylin and eosin (H&E) staining of major organs from mice after injecting them with Mn3O4@PEG-Cy7.5 NPs (dose: 20 mg/kg) at 14 d post-injection. Healthy mice treated with PBS were used as the controls (n = 3).
