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Isolated single umbilical artery and fetal karyotype.
Dagklis T, Defigueiredo D, Staboulidou I, Casagrandi D, Nicolaides KH.
Ultrasound Obstet Gynecol 2010;36:291-5. -
Prevalence of fetal facial cleft at different stages of pregnancy.
Snijders RJ, Sebire NJ, Psara N, Souka A, Nicolaides KH.
Ultrasound Obstet Gynecol 1995;6:327-9.