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Expanded conventional first trimester screening.
Carmichael JB, Liu HP, Janik D, Hallahan TW, Nicolaides KH, Krantz DA.
Prenat Diagn 2017;37:802-807. pdf -
First-trimester contingent screening for trisomies 21, 18 and 13 by biomarkers and maternal blood cell-free DNA testing.
Nicolaides KH, Syngelaki A, Poon LC, Gil M, Wright D.
Fetal Diagn Ther 2014;35:185-92. pdf -
First-trimester combined screening for trisomy 21 at 8-13 weeks.
Wright D, Spencer K, Kagan K, Tørring N, Petersen O, Christou A, Kallikas J, Nicolaides K.
Ultrasound Obstet Gynecol 2010;36:404-11. -
Two-stage first-trimester screening for trisomy 21 by ultrasound assessment and biochemical testing.
Kagan K, Staboulidou I, Cruz JJ, Wright D, Nicolaides K.
Ultrasound Obstet Gynecol 2010;36:542-7.