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. 2009 Sep 16;118(1):87–91. doi: 10.1289/ehp.0900818

Figure 1.

Figure 1

Percent changes (95% CIs) in 5-min HRV indices associated with an IQR (69.5 μg/m3) increase of the PM2.5 for moving averages from 5 min to 4 hr.