Triple marker (α-fetoprotein, unconjugated estriol, human chorionic gonadotropin) versus α-fetoprotein plus free-β subunit in second-trimester maternal serum screening for fetal Down syndrome: A prospective comparison study
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References (16)
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Polypeptide Nicks Cause Erroneous Results in Assays of Human Chorionic Gonadotropin Free β-subunit
1992 • 39 citations
Serum Free β-Human Chorionic Gonadotrophin Concentrations Increase in Unseparated Blood Specimens
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Down syndrome screening
1994 • 16 citations
Early detection of abdominal pregnancy by maternal serum AFP+ screening
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