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Analysis of Cell-Free DNA in Maternal Blood in Screening For Aneuploidies: Updated Meta-Analysis.
Gil MM, Accurti V, Santacruz B, Plana MN, Nicolaides KH.
Ultrasound Obstet Gynecol 2017;50:302-314. pdf -
Cardiac defects in 1st-trimester fetuses with trisomy 18.
Hyett JA, Moscoso G, Nicolaides KH.
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