title: Update on opioid receptors.
authors.forename: R
authors.initials: R
authors.lastname: Atcheson
authors.forename: D G
authors.initials: DG
authors.lastname: Lambert
mesh_terms: D000698:Analgesia; D006801:Humans; D011957:Receptors, Opioid / Q000502:physiology*; D017465:Receptors, Opioid, delta / Q000502:physiology; D017473:Receptors, Opioid, kappa / Q000502:physiology; D017450:Receptors, Opioid, mu / Q000502:physiology
chemical_list: D011957:Receptors, Opioid; D017465:Receptors, Opioid, delta; D017473:Receptors, Opioid, kappa; D017450:Receptors, Opioid, mu