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A) Changes in viscosity across shear rate for 4% gelatin bioinks with cellular concentration from 0 to 30 × 106 cells/mL. B) Bioinks containing 1, 10, or 30 × 106 cells/mL were bioprinted in 4% gelatin bioink using optimized printing parameters. C) Phase contrast micrographs demonstrate the varying cellular densities across the bioprinted groups.
