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