RT Journal Article SR Electronic T1 Discrete-Trial Choice Procedure: Effects of Naloxone and Methadone on Choice between Food and Heroin JF Pharmacological Reviews JO Pharmacol Rev FD American Society for Pharmacology and Experimental Therapeutics SP 357 OP 365 VO 27 IS 3 A1 Griffiths, Roland R. A1 Wurster, Richard M. A1 Brady, Joseph V. YR 1975 UL http://pharmrev.aspetjournals.org/content/27/3/357.abstract AB