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hAMCs improved tissue repair on VML. H&E and Masson trichrome staining of 2 and 4 weeks after establishment of VML model (blank group), implantation of GelMA gel (GelMA group), GelMA + hAMCs (hAMCs group), and GelMA + 5-Aza-inducted hAMCs (5-Aza group). The dotted line is the boundary between normal muscle tissue and defect. White arrow shows the neovascularization, black arrow shows fused hAMCs and fiber-like tissue. 200×. Adapted from Zhang et al.74
