RT Journal Article SR Electronic T1 Superwarfarin ingestion JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 34 OP 35 VO 146 IS 1 A1 D. V. Exner A1 W. F. Brien A1 M. J. Murphy YR 1992 UL http://www.cmaj.ca/content/146/1/34.abstract