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Cytotoxicity measured via LDH release of OMICS-ALI-exposed RAW264.7 a and A549 cell lines b following exposure to the combustion emission of spruce, the combustion emission of pine, or clean air. * Denotes a significant difference (p < 0.05) from clean air-exposed cells, CA clean air control, AS aerosol deposition, HV enhanced deposition with high voltage. Each bar shows the mean ± SEM, n = 3
