Similarly, PM 2.5 levels decreased from 42.8 ± 29.4 μg/m3 (range: 6.9–119.8 μg/m3) to 18.6 ± 8.8 μg/m3 (range: 5.1–33.9 μg/m3) following the policy implementation, but the change did not reach statistical significance (p > 0.05).
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Environmental monitoring and smoking exposure before and after the designation of non-smoking areas in indoor sports facilities.
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