-
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. -
Frontomaxillary and mandibulomaxillary facial angles at 11 + 0 to 13 + 6 weeks in fetuses with trisomy 18.
Borenstein M, Persico N, Strobl I, Sonek J, Nicolaides KH.
Ultrasound Obstet Gynecol 2007;30:928-33.