DOI:
10.1055/s-00000089
Ultraschall in der Medizin - European Journal of Ultrasound
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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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