title: Conditioned preferences in the rat with an unnatural need state: morphine withdrawal.
mesh_terms: D000085:Acetates; D000818:Animals; D001066:Appetite / Q000187:drug effects; D001362:Avoidance Learning; D003213:Conditioning, Psychological; D004327:Drinking Behavior; D005260:Female; D006801:Humans; D007274:Injections, Intraperitoneal; D009020:Morphine / Q000008:administration & dosage; D009021:Morphine Dependence; D051381:Rats; D012439:Saccharin; D013375:Substance Withdrawal Syndrome; D013395:Sucrose; D013649:Taste; D014867:Water
chemical_list: D000085:Acetates; D014867:Water; D013395:Sucrose; D009020:Morphine; D012439:Saccharin