DOI:
10.1055/s-00000020
Geburtshilfe und Frauenheilkunde
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References
Verkleij CP, van Oppen AC, Mulder EJ et al.
Evaluation of antenatal umbilical coiling index at 16–21 weeks of gestation as a predictor of trisomy 21 and other chromosomal defects.
Ultrasound Obstet Gynecol 2013;
42: 545-552
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