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. 2006 Jan 13;114(5):655–660. doi: 10.1289/ehp.8578

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ORs and 95% CIs for 2-day lag for the association of source-specific PM_2.5, (total) PM_2.5, UF, and PM_2.5 ABS with the occurrence of ST segment depressions > 0.1 mV. ORs were calculated for an increase of interquartile range of pollutant.