title: Further observations: false negative EMIT cannabinoids.
authors.forename: W A
authors.initials: WA
authors.lastname: Joern
mesh_terms: D002186:Cannabinoids / Q000652:urine*; D005188:False Negative Reactions; D006801:Humans; D007124:Immunoenzyme Techniques
chemical_list: D002186:Cannabinoids