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. 2024 Dec 18;24:3484. doi: 10.1186/s12889-024-21048-w

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© The Author(s) 2024

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Fig. 2 — Nonlinear associations between exposure to NO₂ (lag 0–5) and respiratory mortalities. A total respiratory deaths, B Deaths due to pneumonia, C Deaths due to chronic lower respiratory diseases, D Deaths due to other respiratory diseases (not classified into pneumonia or chronic lower respiratory-related deaths). NO₂: Nitrogen dioxide (ppm)