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. 2021 May 6;14:1833–1841. doi: 10.2147/RMHP.S307247

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© 2021 Qiu et al.

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The daily pollen concentration and the Baidu index of AR and AC in Beijing during pollen seasons (r _AR-Pollen=0.826, P<0.001; r _AC-Pollen=0.564, P<0.001).