Fig. 3From: Effects of particulate matter (PM) on childhood asthma exacerbation and control in Xiamen, ChinaDistribution and exposure level to PM10.Panel (a): Distribution of exposure days of PM10 in one week before the exacerbation and the density curve; Panel(b): Distribution of exposure days of PM10 in two weeks before the exacerbation and the density curve; Panel(c): Exposure days of PM10 in one week (red line) and in two weeks (blue line) before the exacerbationBack to article page