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The cell viability of different hydrogels at a concentration of 250 μg/mL (a), the cell viability of the hydrogel at different concentrations (50–300 μg/mL) (b), L929 cells multiply on different CS/HA hydrogel surfaces (c, e) and CS/HA/Si-HPMC hydrogel surfaces (d, f) at different times (24 h and 48 h). (Scale bar = 100 μm).
