RT Journal Article SR Electronic T1 Re: Norman AB, Tabet MR, Norman MK, and Tsibulsky VL (2014) Maintained Cocaine Self-Administration Is Determined by Quantal Responses: Implications for the Measurement of Antagonist Potency. J Pharmacol Exp Ther 348:311–315; doi:10.1124/jpet.113.210690 JF Journal of Pharmacology and Experimental Therapeutics JO J Pharmacol Exp Ther FD American Society for Pharmacology and Experimental Therapeutics SP 241 OP 241 DO 10.1124/jpet.113.210690retraction VO 358 IS 2 YR 2016 UL http://jpet.aspetjournals.org/content/358/2/241.abstract AB