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In vitro cytotoxicity of DSPE-PEG-C60/NCTD micelles, DSPE-PEG/NCTD micelles and free NCTD was determined after 72 h using CCK-8 assays to measure cell inhibition rates. Data represent the mean ± SD from three independent experiments (* p < 0.05, ** p < 0.01, *** p < 0.001 and **** p < 0.0001).
