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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. -
Dose dependency between cigarette consumption and reduced maternal serum PAPP-A levels at 11-13(+6) weeks of gestation.
Kagan KO, Frisova V, Nicolaides KH, Spencer K.
Prenat Diagn 2007;27:849-53.