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Lag-specific relative risks (RR, with 95% confidence interval) for dairy cow mortality associated with a 10 µg/m3 increase in air pollutant concentrations during the warm season (left panel: A, C, E for O3, PM10, NO2 respectively) and the cold season (right panel: B, D, F for O3, PM10, NO2 respectively), Belgium 2006-2009.
