title: Endogenous opiate system and systematic desensitization.
mesh_terms: D001521:Behavior Therapy; D003887:Desensitization, Psychologic; D004311:Double-Blind Method; D004723:Endorphins / Q000502:physiology*; D006801:Humans; D009270:Naloxone / Q000494:pharmacology; D010698:Phobic Disorders / Q000628:therapy*
chemical_list: D004723:Endorphins; D009270:Naloxone