DOI:
10.1055/s-00000089
Ultraschall in der Medizin - European Journal of Ultrasound
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References
Sonek J, Borenstein M, Downing C et al.
Frontomaxillary facial angles in screening for trisomy 21 at 14–23 weeks’ gestation.
Am J Obstet Gynecol 2007;
197: 160.e1-160.e5
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