RT Journal Article SR Electronic T1 Metabolism of alfentanil by cytochrome P4503A (CYP3A) enzymes JF Drug Metabolism and Disposition JO Drug Metab Dispos FD American Society for Pharmacology and Experimental Therapeutics DO 10.1124/dmd.104.002709 A1 Theresa Klees A1 Pamela Sheffels A1 Ola Dale A1 Evan D. Kharasch YR 2004 UL http://dmd.aspetjournals.org/content/early/2004/11/22/dmd.104.002709.abstract AB