DOI:
10.1055/s-00000089
Ultraschall in der Medizin - European Journal of Ultrasound
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References
Alldred SK, Takwoingi Y, Guo B. et al.
First trimester ultrasound tests alone or in combination with first trimester serum tests for Down’s syndrome screening.
Cochrane Database Syst Rev 2017;
3: CD012600
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