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