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. 2008 Aug 25;117(1):105–111. doi: 10.1289/ehp.11062

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Pooled effect estimates (95% CIs) for two study panels (Amsterdam and Helsinki) for the association outdoor, indoor, and personal PM_2.5at 0-day lag with HRV (SDNN and HF). Effect estimates are calculated for an increase of 10 μg/m³ for PM_2.5 and 1 m⁻¹ × 10⁻⁵ for absorbance.