@article{f0e96acd6e2345859aca4771885ed05f,
title = "First-Trimester Screening for Down Syndrome with Serum Sampling at Different Gestational Ages: The Effect on Screening Performance",
abstract = "Introduction: The objective of this study was to evaluate the performance of first-trimester Down syndrome (DS) screening with serum sampling at different weeks of gestation.",
author = "M.A.M.J. Engels and J.W.R. Twisk and M.A. Blankenstein and {van Vugt}, J.M.G.",
year = "2014",
doi = "https://doi.org/10.1159/000362186",
language = "English",
volume = "36",
pages = "293--298",
journal = "Fetal Diagnosis and Therapy",
issn = "1015-3837",
publisher = "S. Karger AG",
number = "4",
}