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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. -
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.