DOI:
10.1055/s-00000089
Ultraschall in der Medizin - European Journal of Ultrasound
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References
Nicolaides KH, von Kaisenberg CS.
Die Ultraschalluntersuchung von 11-13+6 Schwangerschaftswochen.
London:
Fetal Medicine Foundation; 2004
www.fetalmedicine.com
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