D little o super little a Ab:PrThr:Pt:Ser/Plas^BPU:Ord
d little o super little a ab:prthr:pt:ser/plas^bpu:ord
Do^a Antibody:Presence or Threshold:To identify measures at a point in time:Serum/Plasma^BPU:Ordinal
do^a antibody:presence or threshold:to identify measures at a point in time:serum/plasma^bpu:ordinal