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. 2014 Jun 6;122(9):906–911. doi: 10.1289/ehp/1408092

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Estimates of lung cancer risk associated a 10-μg/m³ change in exposure to PM_2.5 (A) and PM₁₀ (B) overall and by geographic region of study. Weights represent the contribution of each study effect estimate to the overall meta-estimate. ^aJerrett et al. (2013) contributes neither to the overall nor to the continent-specific meta-estimates; it is only included here for visualization.