P1 Ab:PrThr:Pt:Ser/Plas^BPU:Ord
p1 ab:prthr:pt:ser/plas^bpu:ord
P1 Antibody:Presence or Threshold:To identify measures at a point in time:Serum/Plasma^BPU:Ordinal
p1 antibody:presence or threshold:to identify measures at a point in time:serum/plasma^bpu:ordinal