DOI: 10.1055/s-00000089

Ultraschall in der Medizin - European Journal of Ultrasound

References

Zoppi MA, Ibba RM, Axiana C. et al.
Absence of fetal nasal bone and aneuploidies at first-trimester nuchal translucency screening in unselected pregnancies. 
Prenat Diagn 2003; 23: 496-500  

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