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. 2023 Feb 3;13(6):1600–1620. doi: 10.1007/s13346-023-01297-9

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Fig. 1 — Schematic of the mechanism of action between MNs and skin. The preparation process of drug-loaded solid MNs with a two-step casting method [24], Copyright 2021 American Chemical Society; b droplet-born air-blowing method [25], Copyright 2021 Elsevier; and c free radical polymerization method [26], Copyright 2022 Royal Society of Chemistry