title: Introduction to the issues: assays for screening contamination.
authors.affiliation: CBER/FDA, Bethesda MD, USA.
authors.forename: I K
authors.initials: IK
authors.lastname: Hewlett
mesh_terms: D000818:Animals; D001709:Biotechnology / Q000379:methods*; D004340:Drug Contamination; D006801:Humans; D014780:Viruses / Q000302:isolation & purification*