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Puncture experiment and skin healing experiment. (A) Hematoxylin-eosin-stained cross-section of inserted skin by HMNs (Scale bar: 50 μm). (B) Skin healing images at 0 min, 10 min, 20 min, 30 min, 60 min, and 120 min after the HMNP treatment (Scale bar: 500 μm).
