-
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. -
First-trimester maternal serum activin A in pre-eclampsia and fetal growth restriction.
Ong CY, Liao AW, Munim S, Spencer K, Nicolaides KH.
J Matern Fetal Neonatal Med 2004;15:176-80.