DOI:
10.1055/s-00000089
Ultraschall in der Medizin - European Journal of Ultrasound
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References
Gasiorek-Wiens A, Tercanli S, Kozlowski P. et al.
Screening for trisomy 21 by fetal nuchal translucency and maternal age: a multicenter project in Germany, Austria and Switzerland.
Ultrasound Obstet Gynecol 2001;
18: 645-648
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