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First-trimester maternal serum tumor necrosis factor receptor-1 and pre-eclampsia.
Leal AM, Poon LC, Frisova V, Veduta A, Nicolaides KH.
Ultrasound Obstet Gynecol 2009;33:135-41. -
Maternal serum angiopoietin-2 at 11 to 13 weeks of gestation in hypertensive disorders of pregnancy.
Akolekar R, Casagrandi D, Skyfta E, Ahmed AA, Nicolaides KH.
Prenat Diagn 2009;29:847-51.