title: Free beta-protein studies need confirmation.
authors.forename: R C
authors.initials: RC
authors.lastname: Goodlin
mesh_terms: D015415:Biomarkers; D001798:Blood Proteins / Q000032:analysis*; D006063:Chorionic Gonadotropin / Q000032:analysis*; D018997:Chorionic Gonadotropin, beta Subunit, Human; D004314:Down Syndrome / Q000175:diagnosis*; D006801:Humans; D010446:Peptide Fragments / Q000032:analysis*
chemical_list: D015415:Biomarkers; D001798:Blood Proteins; D006063:Chorionic Gonadotropin; D018997:Chorionic Gonadotropin, beta Subunit, Human; D010446:Peptide Fragments