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First-Trimester Screening for Trisomy 21 Using Alpha-Fetoprotein.
Bredaki FE, Wright D, Matos P, Syngelaki A, Nicolaides KH.
Fetal Diagn Ther 2011;30:215-8. -
Maternal serum levels of dimeric inhibin A in pregnancies affected by trisomy 21 in the first trimester.
Spencer K, Liao AW, Ong CY, Geerts L, Nicolaides KH.
Prenat Diagn 2001;21:441-4. -
Maternal serum levels of total activin-A in first-trimester trisomy 21 pregnancies.
Spencer K, Liao AW, Skentou H, Ong CY, Nicolaides KH.
Prenat Diagn 2001;21:270-3.