DOI:
10.1055/s-00000089
Ultraschall in der Medizin - European Journal of Ultrasound
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References
von Kaisenberg CS, Gasiorek-Wiens A, Bielicki M et al.
Screening for trisomy 21 by maternal age, fetal nuchal translucency and maternal serum biochemistry at 11–14 weeks: a German multicenter study.
J Matern Fetal Neonatal Med 2002;
12: 89-94
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