HPA 1a-1a+HPA 3a-3a:PrThr:Pt:Bld:Ord
hpa 1a-1a+hpa 3a-3a:prthr:pt:bld:ord
HPA 1a-1a+HPA 3a-3a:Presence or Threshold:To identify measures at a point in time:Whole blood:Ordinal
hpa 1a-1a+hpa 3a-3a:presence or threshold:to identify measures at a point in time:whole blood:ordinal