RT Journal Article SR Electronic T1 Undifferentiated radioactivity revisited. JF Drug Metabolism and Disposition JO Drug Metab Dispos FD American Society for Pharmacology and Experimental Therapeutics SP 287 OP 288 VO 8 IS 4 A1 F J Di Carlo YR 1980 UL http://dmd.aspetjournals.org/content/8/4/287.abstract AB