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Macroscopic views of (a) GelMA hydrogels and (b) scaffold-GelMA hydrogels (5 wt% GelMA) encapsulated with fibroblasts, taken at day 1, 4 and 7 of culture. GelMA hydrogel without the scaffold disintegrated over time (a), whereas GelMA hydrogel reinforced with the scaffold was well maintained during the same period (b).
