@article{bf093db01d00440784cb4ddcb4f8f8a9,
title = "Prenasal Thickness-Nasal Bone length ratio: a strong and simple second and third trimester marker for trisomy 21.",
author = "\{de Jong-Pleij\}, E.A. and F.I. Vos and L.S.M. Ribbert and L.R. Pistorius and E. Tromp and C.M. Bilardo",
year = "2012",
doi = "10.1002/uog.9047.",
language = "Undefined/Unknown",
volume = "39",
pages = "185--190",
journal = "Ultrasound in Obstetrics and Gynecology",
issn = "0960-7692",
publisher = "John Wiley \& Sons Inc.",
number = "2",
}