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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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Scanning electron microscopy images of pure and biomolecule-loaded poly(lactic-co-glycolic acid) (PLGA) nanofibers and their size distributions. (A) Pure PLGA nanofibers, (B) drug-loaded nanofibers, and (C) bone morphogenetic protein-2 (BMP-2)-incorporated sheath-core structured nanofibers. (D) Transmission electron microscopy image of BMP-2-incorporated sheath-core structured nanofibers.