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Frontomaxillary facial angles in screening for trisomy 21 at 14-23 weeks gestation.
Sonek J, Borenstein M, Downing C, McKenna D, Neiger R, Croom C, Genrich T, Nicolaides KH.
Am J Obstet Gynecol 2007;197:160. -
Some thoughts on the true value of ultrasound.
Nicolaides KH.
Ultrasound Obstet Gynecol 2007;30:671-4.