DOI:
10.1055/s-00000089
Ultraschall in der Medizin - European Journal of Ultrasound
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References
Spencer K, Nicolaides KH.
A first trimester trisomy 13/ trisomy 18 risk algorithm combining fetal nuchal translucency thickness, maternal serum free beta-hCG and PAPP-A.
Prenat Diagn 2002;
22: 877-879
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