title: Practical challenges to positive drug tests for marijuana.
authors.forename: Mahmoud A
authors.initials: MA
authors.lastname: ElSohly
mesh_terms: D000284:Administration, Oral; D002188:Cannabis; D013759:Dronabinol / Q000493:pharmacokinetics / Q000494:pharmacology / Q000652:urine; D005502:Food; D006801:Humans; D002189:Marijuana Abuse / Q000175:diagnosis* / Q000652:urine; D010938:Plant Oils / Q000493:pharmacokinetics / Q000494:pharmacology; D012639:Seeds; D015813:Substance Abuse Detection / Q000379:methods*
chemical_list: D010938:Plant Oils; D013759:Dronabinol