DOI:
10.1055/s-00000142
Frauenheilkunde up2date
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References
Kozlowski P, Burkhardt T, Gembruch U. et al.
Germany Recommendations for the Implementation of First-Trimester Screening, Detailed Ultrasound, Cell-Free DNA Screening and Diagnostic Procedures.
Ultraschall Med 2018;
DOI: 10.1055/a-0631-8898.
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