RT Journal Article SR Electronic T1 Impact of Impurity on Kinetic Estimates from Transport and Inhibition Studies JF Journal of Pharmacology and Experimental Therapeutics JO J Pharmacol Exp Ther FD American Society for Pharmacology and Experimental Therapeutics DO 10.1124/jpet.107.135863 A1 Pablo M Gonzalez A1 James E. Polli YR 2008 UL http://jpet.aspetjournals.org/content/early/2008/05/06/jpet.107.135863.abstract AB