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(I) Optical micrographs of GRH gelatin-based hydrogel scaffolds: (A) wet; (B) lyophilized and SEM micrographs (C) 50×; (D) 1000×. (II) (A) Scheme of wound evolution evaluation. (B) Optical images of wounds treated with GRH for 13 days. Scale bar: 2 cm. (C) Reduction of the wound sizes (% of the initial wound size, n = 6) [139].
