Jugder, G.; Unshigbayar, O.; Ichinkhorloo, P.; Boldoo, T.; Purev, E. The Use of Double Test Biomarkers to Predict Fetal Nuchal Translucency Thickness in the Diagnosis of Trisomy 21: A Compromise Between Sensitivity and Specificity. Cent Asian J Med Sci 2018, 4, 230-237.