Carboxy tetrahydrocannabinol cutoff:MCnc:Pt:Urine:Qn:Confirm
carboxy tetrahydrocannabinol cutoff:mcnc:pt:urine:qn:confirm
Carboxy tetrahydrocannabinol cutoff [Mass/volume] in Urine for Confirmatory method
carboxy tetrahydrocannabinol cutoff [mass/volume] in urine for confirmatory method