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Diagnosis of major heart defects by routine first-trimester ultrasound examination: association with increased nuchal translucency, tricuspid regurgitation and abnormal flow in ductus venosus.
Minnella GP, Crupano FM, Syngelaki A, Zidere V, Akolekar R, Nicolaides KH.
Ultrasound Obstet Gynecol 2020;55:637-644. pdf -
Meta-analysis of second-trimester markers for trisomy 21.
Agathokleous M, Chaveeva P, Poon LC, Kosinski P, Nicolaides KH.
Ultrasound Obstet Gynecol 2013;41:247-61.