Carboxy tetrahydrocannabinol Delta 9/Creatinine:MRto:Pt:Urine:Qn
carboxy tetrahydrocannabinol delta 9/creatinine:mrto:pt:urine:qn
Carboxy tetrahydrocannabinol Delta 9/Creatinine (U) [Mass ratio]
carboxy tetrahydrocannabinol delta 9/creatinine (u) [mass ratio]