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. 2011 Feb 8;119(6):815–820. doi: 10.1289/ehp.1003100

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Temporal variation of ∑PPAH_12-BaPeq and ∑302PAH_5-BaPeq. Horizontal lines show ∑PAH_17-BaPeq during the source control period (dashed line), the nonsource control period (dotted line), and the Olympic period (solid line). The figure excludes 4–12 September 2008 because of sampler motor failure.