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Prediction of spontaneous preterm delivery from maternal factors, obstetric history and placental perfusion and function at 11-13 weeks.
Beta J, Akolekar R, Ventura W, Syngelaki A, Nicolaides KH.
Prenat Diagn 2011;31:75-83. -
Hypertensive disorders in pregnancy: screening by biophysical and biochemical markers at 11-13 weeks.
Poon LC, Akolekar R, Lachmann R, Beta J, Nicolaides KH.
Ultrasound Obstet Gynecol 2010;35:662-70.