ACSRSAsymptomatic Carotid Stenosis and Risk of Stroke
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Two of the scenarios presented here had annual average concentrations higher than the reference case; however, none had concentrations that exceed ACSRs.
For simplicity, these ratios will be referred to in the rest of the text as the acute-to-chronic standards ratios (ACSR).
For all of the ventilation scenarios, maximum ratios of short-term to annual average concentrations for 1-h and 8-h time frames are well below the ACSR values, independent of whether annual average concentrations exceed unity.