title: Serum screening for Down's syndrome. Vacutainer system can lead to inaccurate results.
authors.forename: W A
authors.initials: WA
authors.lastname: Bartlett
authors.forename: C
authors.initials: C
authors.lastname: Ford
authors.forename: A F
authors.initials: AF
authors.lastname: Jones
mesh_terms: D000328:Adult; D006063:Chorionic Gonadotropin / Q000032:analysis; D004314:Down Syndrome / Q000517:prevention & control*; D005260:Female; D006801:Humans; D011247:Pregnancy; D011296:Prenatal Diagnosis / Q000592:standards*; D000509:alpha-Fetoproteins / Q000032:analysis
chemical_list: D006063:Chorionic Gonadotropin; D000509:alpha-Fetoproteins