title: The nature of opiate dependence.
mesh_terms: D000818:Animals; D006168:Guinea Pigs; D007082:Ileum / Q000187:drug effects; D066298:In Vitro Techniques; D009292:Narcotic Antagonists / Q000494:pharmacology; D009293:Opioid-Related Disorders / Q000209:etiology*; D011957:Receptors, Opioid / Q000187:drug effects
chemical_list: D009292:Narcotic Antagonists; D011957:Receptors, Opioid