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. 2017 Apr 3;7:45322. doi: 10.1038/srep45322

Figure 2. Increment in heart rate (HR) associated with PM2.5, and the intervention effect of B vitamin supplementation.

Figure 2

The intervention effect represents the difference in estimated PM2.5 effects between exposure 2 and exposure 3 (due to B vitamin supplementation). Results were adjusted for chamber humidity, chamber temperature, and season (Spring/Summer/Fall/Winter).