DOI: 10.1055/s-00000089

Ultraschall in der Medizin - European Journal of Ultrasound

References

Staboulidou I, Wüstemann M, Vaske B. et al
Interobserver variability of the measurement of fetal nasal bone length between 11 + 0 and 13 + 6 gestation weeks among experienced and inexperienced sonographers. 
Ultraschall in Med 2009; 30: 42-46  

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