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In vitro cytotoxicities of blank carriers with different PS amounts (0%, 4%, 8%, and 12%) at concentrations ranging from 200 to 2000 μg/mL. Blank carriers were non-toxic in the concentrations of 200–500 μg/mL, and the cells’ viability was decreased as the carriers’ concentrations increased (mean ± SD, n = 3). All preparations showed negligible cytotoxicities without significant differences between groups (p > 0.05).
