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Fibroblast proliferation over 10 days as a function of collagen concentration, n = 6 per group and per time point (* denotes statistically significant difference with respect to other day-10 groups, p < 0.005). Day 1 absorbancies around 0.4 reflect initial cell density of 5 × 105 cells/mL (i.e., 2.5 × 105 cells per construct). Columns and error bars represent mean and standard deviation, respectively.
