DOI: 10.1055/s-00000089

Ultraschall in der Medizin - European Journal of Ultrasound

References

Borenstein M, Persico N, Kaihura C. et al
Frontomaxilary facial angle in chromosally normal fetuses at 11 + 0 to 13 + 6 weeks. 
Ultrasound Obstetr Gynecol 2007; 30: 737-741  

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