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. 2021 Jul 1;16:4471–4480. doi: 10.2147/IJN.S318083

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© 2021 Liu et al.

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Histological images of the experimental group (with membranes) on (A) day 1, (B) day 3, and (C) day 7, and the control group (without membranes) on (D) day 7 (Scale bar: 1 mm).