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. 2022 Aug 4;17:3483–3495. doi: 10.2147/IJN.S372851

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© 2022 Wei et al.

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The immunohistochemical staining of Ki-67 of the osteosarcoma tissues (A) and HE staining of heart tissue sections (B) from osteosarcoma-bearing mice treated with saline (control), free Exo, free Dox or Exo-Dox. Ki-67 positive cells were counted using Image Pro Plus 6.0 software.