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Maternal serum vitamin D levels at 11-13 weeks of gestation in preeclampsia.
Yu CK, Ertl R, Skyfta E, Akolekar R, Nicolaides KH.
Hum Hypertens 2013;27:115-8 . pdf -
Maternal serum cytokines at 30-33 weeks in the prediction of preeclampsia.
Mosimann B, Wagner M, Poon LC, Bansal AS, Nicolaides KH.
Prenat Diagn 2013;33:823-30. pdf