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Table 2 Average PM2.5 concentration (± standard deviation) for clean air and concentrated PM2.5 exposures (μg/m3)

From: Low levels of fine particulate matter increase vascular damage and reduce pulmonary function in young healthy adults

Exposure Treatment Mean (± SD)
Clean air 2.1 ± 2.6
Concentrated PM2.5 37.8 ± 6.5