L little u 20 Ag:PrThr:Pt:RBC:Ord
l little u 20 ag:prthr:pt:rbc:ord
L little u 20 Antigen:Presence or Threshold:To identify measures at a point in time:Erythrocytes:Ordinal
l little u 20 antigen:presence or threshold:to identify measures at a point in time:erythrocytes:ordinal