The effect magnitude of PM 10 showed a decreasing trend from L0 to L7.
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The Association between Ambient Air Pollution and Allergic Rhinitis: Further Epidemiological Evidence from Changchun, Northeastern China.
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The sentences
The effect magnitude of SO 2 for both single-day and multi-day lags showed a decreasing trend from the current day to the third day, but then showed an increasing trend from the third day to the sixth day.