Typist: say "delta9" for 0.
D000818:Animals; D001522:Behavior, Animal / Q000187:drug effects*; D001578:Benzopyrans / Q000008:administration & dosage / Q000494:pharmacology*; D002188:Cannabis; D010856:Columbidae; D004361:Drug Tolerance; D012054:Reinforcement, Psychology; D013501:Surface-Active Agents
D001578:Benzopyrans; D013501:Surface-Active Agents