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Printed hydrogel designs. From left to right and top to bottom: (a) voronoi printed design; (b) grid printed design; (c) hexagon printed design; (d) average line width of the printed hydrogel systems (HG-1 to HG-6) in the grid design with one, five, and ten layers; (e) average line width of the hydrogel in the different processes, after printing (pre-crosslinked), after crosslinking, and after freeze drying.
