DOI:
10.1055/s-00000089
Ultraschall in der Medizin - European Journal of Ultrasound
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References
Snijders RJM, Noble P, Sebire N. et al
UK multicentre project on assessment of risk of trisomy 21 by maternal age and fetal nuchal-translucency thickness at 10 – 14 weeks of gestation.
Lancet 1998; 351: 343-346
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