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Combined screening for preeclampsia and small for gestational age at 11-13 weeks.
Poon LC, Syngelaki A, Akolekar R, Lai J, Nicolaides KH.
Fetal Diagn Ther 2013;33:16-27. -
Cardiac defects in chromosomally normal fetuses with abnormal ductus venosus blood flow at 10-14 weeks.
Matias A, Huggon I, Areias JC, Montenegro N, Nicolaides KH.
Ultrasound Obstet Gynecol 1999;14:307-10.