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Learning curve for sonographic examination of the fetal nasal bone at 11-14 weeks.
Cicero S, Dezerega V, Andrade E, Scheier M, Nicolaides KH.
Ultrasound Obstet Gynecol 2003;22:135-7. -
Fetal nasal bone length in chromosomally normal and abnormal fetuses at 11-14 weeks of gestation.
Cicero S, Bindra R, Rembouskos G, Tripsanas C, Nicolaides KH.
J Matern Fetal Neonatal Med 2002;11:400-2. -
Absence of nasal bone in fetuses with trisomy 21 at 11-14 weeks of gestation: an observational study.
Cicero S, Curcio P, Papageorghiou A, Sonek J, Nicolaides K.
Lancet 2001;358:1665-7.