RT Journal Article SR Electronic T1 THEORIES OF DRUG ANTAGONISM JF Pharmacological Reviews JO Pharmacol Rev FD American Society for Pharmacology and Experimental Therapeutics SP 211 OP 218 VO 9 IS 2 A1 J. H. Gaddum YR 1957 UL http://pharmrev.aspetjournals.org/content/9/2/211.abstract AB