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Chronic administration of morphine and naltrexone up-regulate μ-opioid binding sites labeled by [3H][D-Ala2, MePhe4, Gly-ol5]enkephalin: further evidence for two μ-binding sites

Opioid EpidemicMolecular PharmacologyBiochemistryMedicineChronic AdministrationMechanism Of ActionNeuropharmacologyμ-Binding SitesExperimental PharmacologyPharmacotherapyOpioid OverdosePharmacologyOpioid Use DisorderFurther EvidenceHealth Sciences