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Concentration- and time-dependent effects of B[a]P on the viability of RPTEC/TERT1 cells after (A) 24 h, (B) 48 h and (C) 1 week of B[a]P exposure. Viabilities are expressed as percent of vehicle control, DMSO, at each time point as indicated by the MTT viability assay. Bars represent mean viability (n = 8) ± SEM, * indicates significant difference from DMSO, p < 0.001,† indicates significant difference from DMSO, p < 0.01, # indicates significant difference from DMSO, p < 0.05.
