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. 2013 Apr 19;121(7):825–831. doi: 10.1289/ehp.1306528

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Effects of BaP in combination with nicotine (Nic) on neurodifferentiation into dopaminergic and cholinergic phenotypes. (A) TH (tyrosine hydroxylase). (B) ChAT (choline acetyltransferase). (C) TH/ChAT ratio. Where there was a significant interaction, the percent change caused by BaP relative to the corresponding BaP 0 group for each Nic concentration is shown on the right. Data represent means ± SEs of the number of determinations shown within bars. ANOVAs for the main effects of treatment and interactions of BaP with nicotine are shown at the top of each panel. NS, not significant. *p < 0.05 compared with the corresponding BaP 0 group. ^†p < 0.05 compared with the corresponding Nic 0 group.