RT Journal Article SR Electronic T1 Methods used for the study of opioid receptors. JF Pharmacological Reviews JO Pharmacol Rev FD American Society for Pharmacology and Experimental Therapeutics SP 197 OP 249 VO 39 IS 3 A1 F M Leslie YR 1987 UL http://pharmrev.aspetjournals.org/content/39/3/197.abstract AB