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Uterine artery Doppler and mid-trimester maternal plasma homocysteine in subsequent pre-eclampsia.
Yu CK, Lakasing L, Papageorghiou AT, Spencer K, Nicolaides KH.
J Matern Fetal Neonatal Med 2004;16:134-9. -
Maternal serum S100 protein in normal and Down syndrome pregnancies.
Abraha HD, Noble PL, Nicolaides KH, Sherwood RA.
Prenat Diagn 1999;19:334-6.