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Comparisons of ion yields for characteristic cell membrane lipids obtained from the co-exposure experiment with APAP (5 mmol L−1) and CeO2 NPs (100 µg mL−1). These ions were used to separate the four treatment groups. For the relative intensity, the mean of the control group for unexposed HuH-7 cells was taken as 100% in all cases. ***: p ≤ 0.05.
