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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. -
Chorionic villus sampling at 11 to 13 weeks of gestation and hypertensive disorders in pregnancy.
Khalil A, Akolekar R, Pandya P, Syngelaki A, Nicolaides K.
Obstet Gynecol 2010;116:374-80.