Research ArticleArticle
Interaction Between Medullary and Spinal δ1 and δ2 Opioid Receptors in the Production of Antinociception in the Rat
Robert W. Hurley, Theodore S. Grabow, Ronald J. Tallarida and Donna L. Hammond
Journal of Pharmacology and Experimental Therapeutics May 1999, 289 (2) 993-999;