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. 2021 Nov 23;9(4):2104272. doi: 10.1002/advs.202104272

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© 2021 The Authors. Advanced Science published by Wiley‐VCH GmbH

This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Investigation of the capacity of the oxygen‐containing porous microparticles in promoting wound healing: a) the changes of the wound areas in the control, oxygen and non‐oxygen groups during the wound healing process. The scale bar is 1 cm; b) histological analysis: (i) the results of H&E staining analysis; (ii) the results of Masson staining analysis; (iii) the results of double immunofluorescent staining of CD31 plus α‐smooth muscle actin (α‐SMA); (iv) the results of immunohistochemistry staining of IL‐6. The scale bars are 200 µm in (i) and 100 µm in (ii, iii, iv).