RT Journal Article SR Electronic T1 Diversity of agents that modify opioid tolerance, physical dependence, abstinence syndrome, and self-administrative behavior. JF Pharmacological Reviews JO Pharmacol Rev FD American Society for Pharmacology and Experimental Therapeutics SP 293 OP 324 VO 46 IS 3 A1 H N Bhargava YR 1994 UL http://pharmrev.aspetjournals.org/content/46/3/293.abstract AB