Research ArticleArticle
Sensitivity to the Discriminative Stimulus and Antinociceptive Effects of μ Opioids: Role of Strain of Rat, Stimulus Intensity, and Intrinsic Efficacy at the μ Opioid Receptor
Drake Morgan, Charles D. Cook and Mitchell J. Picker
Journal of Pharmacology and Experimental Therapeutics May 1999, 289 (2) 965-975;