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. 2014 Jul 5;24(4):312–320. doi: 10.2188/jea.JE20130155

Figure 2. The 24-hour mean concentrations of O3 (A), NO2 (B), and SPM (C) for each subject during the study period. The dotted lines show the daily average concentrations of each pollutant for all subjects. *Respiratory function tests were conducted on these days.

Figure 2.