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Maternal serum resistin at 11 to 13 weeks' gestation in normal and pathological pregnancies.
Nanda S, Poon LC, Muhaisen M, Acosta IC, Nicolaides KH.
Metabolism 2012;61:699-705. -
Screening for triploidy by fetal nuchal translucency and maternal serum free beta-hCG and PAPP-A at 10-14 weeks of gestation.
Spencer K, Liao AW, Skentou H, Cicero S, Nicolaides KH.
Prenat Diagn 2000;20:495-9.