title: Action of nor derivates of morphine on the intensity of the abstinence syndrome to morphine in mice.
mesh_terms: D000818:Animals; D003061:Codeine / Q000494:pharmacology*; D006801:Humans; D051379:Mice; D009020:Morphine / Q000494:pharmacology; D009021:Morphine Dependence; D013375:Substance Withdrawal Syndrome
chemical_list: D009020:Morphine; D003061:Codeine