DOI:
10.1055/s-00000089
Ultraschall in der Medizin - European Journal of Ultrasound
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References
Manegold-Brauer G, Bourdil L, Berg C. et al.
Prenasal thickness to nasal bone length ratio in normal and trisomy 21 fetuses at 11–14 weeks of gestation.
Prenat Diagn 2015;
35: 1079-1084
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