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In vitro cytotoxicity. a Hemolyticrate of red blood cells incubated with chitosan/Fe3O4@IL microcapsules at various concentrations for 3 h, using PBS (−) and deionized water (+) as negative and positive controls, respectively. Inset: the photo images for direct observation of hemolysis for microcapsules. b Viabilities of HepG2 cells incubated with chitosan/Fe3O4@IL microcapsules with different concentrations for 24 h
