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Bioprinting of 3D grid pattern structure. A Lab-made 3D printer. B The width (W) and distance (D) were both 5 mm at the fabricated simple-grid scaffold. C Cell-encapsulated hydrogel scaffold with simple grid was fabricated using a needle with an inner diameter of 150 μm. D Cell viability assay showed that cells were alive in the bio-printed hydrogel. Scale bars: 100 μm
