title: Phenylbutazone purity challenge.
authors.affiliation: National Research Council of Canada, 1200 Montreal Road, Ottawa, ON, K1A0R6, Canada.
authors.forename: Garnet
authors.initials: G
authors.lastname: McRae
authors.affiliation: National Research Council of Canada, 1200 Montreal Road, Ottawa, ON, K1A0R6, Canada.
authors.forename: Donald M
authors.initials: DM
authors.lastname: Leek
authors.affiliation: National Research Council of Canada, 1200 Montreal Road, Ottawa, ON, K1A0R6, Canada. enea.pagliano@nrc-cnrc.gc.ca.
authors.forename: Enea
authors.initials: E
authors.lastname: Pagliano