DOI:
10.1055/s-00000089
Ultraschall in der Medizin - European Journal of Ultrasound
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References
Kagan KO, Hoopmann M, Hammer R. et al.
Screening for chromosomal abnormalities by first trimester combined screening and noninvasive prenatal testing.
Ultraschall in der Medizin (Stuttgart, Germany: 1980) 2015;
36: 40-46
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