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. 2016 Mar 24;15:46. doi: 10.1186/s12940-016-0129-9

Fig. 4.

Fig. 4

Lag-0 PM2.5 and risk of MI across strata of regional OPGSH Legend: Ambient PM2.5 and risk of emergency room visits for myocardial infarction at different values of regional OPGSH. Risk estimates reflect a 5 μg/m3 change in Lag-0 PM2.5. All models are adjusted for 3-day mean ambient temperature and relative humidity