T little r super little a Ab:PrThr:Pt:Ser/Plas:Ord
t little r super little a ab:prthr:pt:ser/plas:ord
Tr^a Antibody:Presence or Threshold:To identify measures at a point in time:Serum/Plasma:Ordinal
tr^a antibody:presence or threshold:to identify measures at a point in time:serum/plasma:ordinal