DOI:
10.1055/s-00000089
Ultraschall in der Medizin - European Journal of Ultrasound
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References
Nyberg DA, Luthy DA, Resta RG. et al.
Age-adjusted ultrasound risk assessment for fetal Down’s syndrome during the second trimester: description of the method and analysis of 142 cases.
Ultrasound Obstet Gynecol 1998; 12: 8-14
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