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. 2008 Feb 22;116(6):709–715. doi: 10.1289/ehp.11016

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Infused and noninfused forearm blood flow in all subjects (n = 24) after CAPs and filtered air exposures during intrabrachial infusion of bradykinin (A), acetylcholine (B), and sodium nitroprusside (C). Values shown are mean ± SE. For all dose responses in the infused arm, p < 0.0001. p-Values for CAPs versus filtered air are as follows: bradykinin, p = 0.20; acetylcholine, p = 0.17; and sodium nitroprusside, p = 0.14.