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(A) Workflow of switching hydrogel surface after printing and postcross-linking. Fluorescence images of (B) printed lattice-shaped hydrogel after coating and (C) 10T1/2 cells cultured on the hydrogel for 2 days. The image (scale bar: 200 μm) in upper right corner shows the sign of cell elongation. Scale bars: (B) and (C) 5 mm.
