DOI:
10.1055/s-00000020
Geburtshilfe und Frauenheilkunde
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References
Ashoor G, Poon L, Syngelaki A et al.
Fetal fraction in maternal plasma cell-free DNA at 11–13 weeksʼ gestation: effect of maternal and fetal factors.
Fetal Diagn Ther 2012;
31: 237-243
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