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In vitro cell cytotoxicity of HepG2 cells incubated with (a) free DOX, (b) (Dex)-βCD-(PCL)14@ DOX-SPIO, (c) (Dex-SS)-βCD-(PCL)14@ DOX-SPIO, (d) (FA-Dex)-βCD-(PCL)14@ DOX-SPIO, and (e) (FA-Dex-SS)-βCD-(PCL)14@ DOX-SPIO for 24 and 48 h. The error bars in the graph represent standard deviations (n = 3).
