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Frontomaxillary facial angle in fetuses with spina bifida at 11-13 weeks.
Lachmann R, Picciarelli G, Moratalla J, Green N, Nicolaides KH.
Ultrasound Obstet Gynecol 2010;36:268-71. -
Maternal cardiac function in twin pregnancy.
Kametas NA, McAuliffe F, Krampl E, Chambers J, Nicolaides KH.
Obstet Gynecol 2003;102:806-15.