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Air pollution levels and attributable mortality during the lockdown and deconfinement periods in Spain. OBS = Observed; BAU = Business-as-usual; DIF = Difference (OBS-BAU). Error bars are 95% CIs. Solid error bars represent CIs taking into account both the uncertainties of the fitted regression model and of the estimated BAU levels. For reference, dashed error bars represent CIs without considering the uncertainty in BAU levels.
