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