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Histology of regenerative tissues. (A) H&E staining and Masson staining in gauze groups, PU mats groups and PU/KSNO mats groups. Black frameworks: regenerative tissues, green arrows: native tissues, red arrow: blood vessel, scale bar is 1 mm; (B) the thickness of regenerative tissues in different groups (n = 3). ns, not significant; *, P < 0.05; **, P < 0.01.
