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. 2021 Aug 11;16:5357–5370. doi: 10.2147/IJN.S325885

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© 2021 Yu et al.

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Histological images (hematoxylin and eosin staining) of the fixator/drug group. Rich mono- and multi-nuclear cells (arrow) were observed at 1 week (A) and 2 weeks (B). Oriented fibroblast-like spindle cells (arrow) could be observed at 3 weeks (C), and several small blood vessels (arrow) were observed at 4 weeks (D) post implantation. Scale bar, 500 μm.