title: Differential classical conditioning of abstinence syndrome in morphine-dependent rats.
mesh_terms: D000818:Animals; D001070:Appetitive Behavior; D003214:Conditioning, Classical / Q000187:drug effects; D005108:Extinction, Psychological / Q000187:drug effects; D006801:Humans; D008297:Male; D009020:Morphine / Q000494:pharmacology; D009021:Morphine Dependence; D051381:Rats; D013375:Substance Withdrawal Syndrome; D013647:Task Performance and Analysis; D013997:Time Factors
chemical_list: D009020:Morphine