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. 2021 Feb 17;413:125445. doi: 10.1016/j.jhazmat.2021.125445

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Fig. 13 — Comparison of the number of days with AQHI greater or equal to 4 (moderate risk, as calculated on the MECP website) in 2020 with the corresponding average for 2017–2019 reference years for selected stations during spring/summer months.