DOI:
10.1055/s-00000142
Frauenheilkunde up2date
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References
Wright D, Syngelaki A, Bradbury I. et al.
First-trimester screening for trisomies 21, 18 and 13 by ultrasound and biochemical testing.
Fetal Diagn Ther 2014;
35: 118-126
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