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. 2008 Feb 22;116(5):631–636. doi: 10.1289/ehp.10757

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HRs for witnessed non-DOA OHCAs, for subjects aged 60–75 years, by lagged PM_2.5 exposure. The HR shown is for a 10-μg/m³ increase in PM_2.5. For explanation of lag0, etc., see Figure 4. Error bars indicate 95% CIs.