Carbon dioxide^post dose urea:PrThr:Pt:Exhl gas:Ord
carbon dioxide^post dose urea:prthr:pt:exhl gas:ord
Carbon dioxide^post dose urea:Presence or Threshold:To identify measures at a point in time:Exhaled gas (breath):Ordinal
carbon dioxide^post dose urea:presence or threshold:to identify measures at a point in time:exhaled gas (breath):ordinal