@incollection{Gersak11,
author = {Ksenija Gersak and Maja Pohar-Perme and Darija M. Strah},
title = {First Trimester Screening for Trisomy 21 by Maternal Age, Nuchal Translucency and Fetal Nasal Bone in Unselected Pregnancies},
booktitle = {Genetics and Etiology of Down Syndrome},
publisher = {IntechOpen},
address = {Rijeka},
year = {2011},
editor = {Subrata Dey},
chapter = {17},
doi = {10.5772/23810},
url = {https://doi.org/10.5772/23810}
}