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Nasal bone length in euploid fetuses at 16-24 weeks of gestation by three-dimensional ultrasound.
Persico N, Molina F, Borenstein M, Azumendi G, Nicolaides KH.
Ultrasound Obstet Gynecol 2010;36:285-90. -
Some thoughts on the true value of ultrasound.
Nicolaides KH.
Ultrasound Obstet Gynecol 2007;30:671-4.