DOI:
10.1055/s-00000089
Ultraschall in der Medizin - European Journal of Ultrasound
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References
Borenstein M, Persico N, Kagan KO et al.
Frontomaxillary facial angle in screening for trisomy 21 at 11 + 0 to 13 + 6 weeks.
Ultrasound Obstet Gynecol 2008;
32: 5-11
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