Research ArticleBehavioral Pharmacology
Discriminative Stimulus Effects of Tramadol in Humans
Angela N. Duke, George E. Bigelow, Ryan K. Lanier and Eric C. Strain
Journal of Pharmacology and Experimental Therapeutics July 2011, 338 (1) 255-262; DOI: https://doi.org/10.1124/jpet.111.181131