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Two-stage approach for risk estimation of fetal trisomy 21 and other aneuploidies using computational intelligence systems.
Neocleous AC, Syngelaki A, Nicolaides KH, Schizas CN.
Ultrasound Obstet Gynecol 2018;51:503-508. pdf -
Integrated ultrasound and biochemical screening for trisomy 21 using fetal nuchal translucency, absent fetal nasal bone, free beta-hCG and PAPP-A at 11 to 14 weeks.
Cicero S, Bindra R, Rembouskos G, Spencer K, Nicolaides KH.
Prenat Diagn 2003;23:306-10.