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251 (95% confidence interval 1.220 to 1.283) for CVD incidence and 1.164 (95% confidence interval 1.117 to 1.213) for CVD mortality. The slopes of concentration-response functions of PM2.5 exposure and CVD risks were steeper at high PM2.5 levels. In addition, older residents, rural residents, and never smokers were more prone to adverse effects […] View