-
Maternal serum vitamin D at 11-13 weeks in pregnancies delivering small for gestational age neonates.
Ertl R, Yu CK, Samaha R, Akolekar R, Nicolaides KH.
Fetal Diagn Ther 2012;31:103-8. -
Physiological distribution of placental growth factor and soluble Flt-1 in early pregnancy.
Makrydimas G, Sotiriadis A, Savvidou MD, Spencer K, Nicolaides KH.
Prenat Diagn 2008;28:175-9.