DOI:
10.1055/s-00000089
Ultraschall in der Medizin - European Journal of Ultrasound
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References
Bindra R, Heath V, Liao A. et al.
One-stop clinic for assessment of risk for trisomy 21 at 11 - 14 weeks: a prospective study of 15 030 pregnancies.
Ultrasound Obstet Gynecol 2002; 20: 219-225
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