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First-trimester maternal factors and biomarker screening for preeclampsia.
Poon LC, Nicolaides KH.
Prenat Diagn 2014;34:618-27. pdf -
Prediction of early, intermediate and late pre-eclampsia from maternal factors, biophysical and biochemical markers at 11-13 weeks.
Akolekar R, Syngelaki A, Sarquis R, Zvanca M, Nicolaides KH.
Prenat Diagn 2011;31:66-74.