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Bioprinting of GelMA/alginate core/sheath constructs with tunable microenvironments. A) Stress-strain curves of the bioprinted constructs with different concentrations of GelMA. B) Young’s modulus of the bioprinted constructs. C-E) SEM images of the bioprinted GelMA/alginate constructs after freeze-drying showing the porosity of the cores: (A) 1.0% GelMA; (B) 1.5% GelMA; (C) 2.0% GelMA.
