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. 2007 Aug 16;115(11):1578–1583. doi: 10.1289/ehp.10375

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Estimated pooled percent increase in total and cardiovascular mortality and its 95% confidence intervals associated with an increase of 1 mg/m³ in the level of CO (average of lags 0–1), using different methods for seasonality control—i.e., with a fixed number of annual degrees of freedom and with variable numbers of annual degrees of freedom according to the PACF.