11-Hydroxy delta-9 tetrahydrocannabinol Ql (Specimen), 11OH-THC Spec Ql, 11-Hydroxy delta-9 tetrahydrocannabinol:Presence or Threshold:To identify measures at a point in time:Not specified:Ordinal, 11-Hydroxy delta-9 tetrahydrocannabinol [Presence] in Specimen