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Nuchal translucency measurements for first-trimester screening: The 'price' of inaccuracy.
Evans MI, Van Decruyes H, Nicolaides KH.
Fetal Diagn Ther 2007;22:401-404. -
Frontomaxillary facial angle in chromosomally normal fetuses at 11 + 0 to 13 + 6 weeks.
Borenstein M, Persico N, Kaihura C, Sonek J, Nicolaides KH.
Ultrasound Obstet Gynecol 2007;30:737-41.