DOI:
10.1055/s-00000020
Geburtshilfe und Frauenheilkunde
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References
Snijders RJ, Noble P, Sebire N, Souka A, Nicolaides KH.
UK multicentre project on assessment of risk of trisomy 21 by maternal age and fetal nuchal-translucency thickness at 10 - 14 weeks of gestation. Fetal Medicine Foundation First Trimester Screening Group.
Lancet 1998; 352: 343-346
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