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Three-way interaction between cross-linker concentration, Time and culture type on TNF-α detected in hydrogel cultures. Data is graphed as concentration normalized to total protein levels (pg/g protein). The bars and error bars represent the mean and standard error of the data respectively (N = 9 per co/monoculture group). *p < .05, **p < .01, ***p < .001, ****p < .0001
