title: The stability of blood samples for the measurement of the free beta subunit of chorionic gonadotrophin.
authors.forename: S J
authors.initials: SJ
authors.lastname: Stone
authors.forename: R
authors.initials: R
authors.lastname: Henley
mesh_terms: D001800:Blood Specimen Collection; D006063:Chorionic Gonadotropin / Q000097:blood*; D018997:Chorionic Gonadotropin, beta Subunit, Human; D004314:Down Syndrome / Q000175:diagnosis*; D005189:False Positive Reactions; D005260:Female; D006801:Humans; D010446:Peptide Fragments / Q000097:blood*; D011247:Pregnancy; D011296:Prenatal Diagnosis
chemical_list: D006063:Chorionic Gonadotropin; D018997:Chorionic Gonadotropin, beta Subunit, Human; D010446:Peptide Fragments