DOI:
10.1055/s-00000089
Ultraschall in der Medizin - European Journal of Ultrasound
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References
Sifakis S, Zaravinos A, Maiz N. et al.
First-trimester maternal plasma cell-free fetal DNA and preeclampsia.
American journal of obstetrics and gynecology 2009;
201: 472.e471-477
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