DOI: 10.1055/s-00000089

Ultraschall in der Medizin - European Journal of Ultrasound

References

Orlandi F, Bilardo CM, Campogrande M. et al.
Measurement of nasal bone length at 11 - 14 weeks of pregnancy and its potential role in Down syndrome risk assessment. 
Ultrasound Obstet Gynecol 2003; 22: 36-39  

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