title: Recent studies on heterogeneity and isolation of opioid receptors.
authors.affiliation: Department of Psychiatry, NYU Medical Center, NY 10016.
authors.forename: E J
authors.initials: EJ
authors.lastname: Simon
mesh_terms: D000818:Animals; D011957:Receptors, Opioid / Q000302:isolation & purification* / Q000502:physiology
chemical_list: D011957:Receptors, Opioid