RT Journal Article SR Electronic T1 Electrophysiology of opioids. JF Pharmacological Reviews JO Pharmacol Rev FD American Society for Pharmacology and Experimental Therapeutics SP 219 OP 281 VO 35 IS 4 A1 A W Duggan A1 R A North YR 1983 UL http://pharmrev.aspetjournals.org/content/35/4/219.abstract AB