National scale air toxics assessment diesel PM (DPM):NFr:Pt:^Patient:Qn
national scale air toxics assessment diesel pm (dpm):nfr:pt:^patient:qn
National scale air toxics assessment diesel PM (DPM):Number Fraction:To identify measures at a point in time:^Patient:Quantitative
national scale air toxics assessment diesel pm (dpm):number fraction:to identify measures at a point in time:^patient:quantitative