RT Journal Article SR Electronic T1 International Union of Pharmacology. XIX. The IUPHAR Receptor Code: A Proposal for an Alphanumeric Classification System JF Pharmacological Reviews JO Pharmacol Rev FD American Society for Pharmacology and Experimental Therapeutics SP 271 OP 278 VO 50 IS 2 A1 P. P. A. Humphrey A1 E. A. Barnard YR 1998 UL http://pharmrev.aspetjournals.org/content/50/2/271.abstract AB