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. 2006 May 18;114(8):1227–1232. doi: 10.1289/ehp.9014

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Smoothing plots of O₃ concentration (μg/m³) against mortality risk (logRR, log relative risk; df = 4). (A) All-cause mortality. (B) Cardiovascular mortality. (C) Respiratory mortality. The solid line indicates the estimated mean percentage of change in daily mortality, and the dotted lines represent twice the pointwise SE.