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First-trimester maternal serum matrix metalloproteinase-9 (MMP-9) and adverse pregnancy outcome.
Poon LC, Nekrasova E, Anastassopoulos P, Livanos P, Nicolaides KH.
Prenat Diagn 2009;29:553-9. -
Sonographic measurement of cervical length and fetal fibronectin testing in threatened preterm labor.
Tsoi E, Akmal S, Geerts L, Jeffery B, Nicolaides KH.
Ultrasound Obstet Gynecol 2006;27:368-72.