Protoporphyrin.zinc:PrThr:Pt:Bld:Ord
protoporphyrin.zinc:prthr:pt:bld:ord
Protoporphyrin.zinc:Presence or Threshold:To identify measures at a point in time:Whole blood:Ordinal
protoporphyrin.zinc:presence or threshold:to identify measures at a point in time:whole blood:ordinal