title: Effects of morphine withdrawal on food competition hierarchies and fighting behavior in rats.
mesh_terms: D000374:Aggression / Q000187:drug effects*; D000818:Animals; D003163:Competitive Behavior / Q000187:drug effects*; D003216:Conditioning, Operant / Q000187:drug effects; D005508:Food Deprivation; D006801:Humans; D008297:Male; D009021:Morphine Dependence / Q000523:psychology*; D051381:Rats; D012055:Reinforcement Schedule; D012930:Social Dominance / Q000187:drug effects; D013375:Substance Withdrawal Syndrome / Q000523:psychology*; D013997:Time Factors