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Effect of SmPNPs on pigment restoration during the wound healing. (A) Respective images showing the pigment development and accumulation on the wound site, and (B) Quantitative analysis of pigment development at 2, 7, 14, and 24 dpw. Error bars represent the means plus or minus (± SD) standard deviation (Unpaired two-tailed t-test, ** p < 0.01, n = 5).
