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. 2011 May 17;119(9):1233–1238. doi: 10.1289/ehp.1002904

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NO₂ and mortality, by cause of death and lag (single-lag and constrained and unconstrained distributed-lag models). Values shown are percent increases of risk (95% CI) for 10-μg/m³ increases in NO₂ (pooled results from 10 cities), EpiAir Study, Italy, 2001–2005.