RT Journal Article SR Electronic T1 Preclinical Assessment of Candidate Analgesic Drugs: Recent Advances and Future Challenges JF Journal of Pharmacology and Experimental Therapeutics JO J Pharmacol Exp Ther FD American Society for Pharmacology and Experimental Therapeutics DO 10.1124/jpet.106.106377 A1 S. Stevens Negus A1 Todd W. Vanderah A1 Michael R. Brandt A1 Edward J. Bilsky A1 Lino Becerra A1 David Borsook YR 2006 UL http://jpet.aspetjournals.org/content/early/2006/06/02/jpet.106.106377.abstract AB