title: Endorphins, pain and narcotic use: the emerging paradigm.
mesh_terms: D004723:Endorphins / Q000502:physiology*; D006801:Humans; D007880:Legislation, Drug; D009294:Narcotics / Q000494:pharmacology*; D010146:Pain / Q000188:drug therapy / Q000503:physiopathology*; D014481:United States
chemical_list: D004723:Endorphins; D009294:Narcotics