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First-trimester maternal plasma cell-free fetal DNA and preeclampsia.
Sifakis S, Zaravinos A, Maiz N, Spandidos DA, Nicolaides KH.
Am J Obstet Gynecol 2009;201:472.1-7. -
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.