DOI:
10.1055/s-00000089
Ultraschall in der Medizin - European Journal of Ultrasound
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References
Snijders RJ, 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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