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Correlation of PM2.5 concentrations and cardiovascular disease risk. (A) PM2.5. (B) PM2.5 corrected SO2. (C) PM2.5 corrected NO2. (D) PM2.5 corrected SO2 and NO2. 1, hypertension. 2, cerebral hemorrhage. 3, cerebral infarction. 4, TIA. 5, coronary heart diseases. 6, cardiovascular diseases.
