@article{85a9282984964f0ea355bf40b6d4037e,
title = "Impact of bias in crown-rump length measurement at first-trimester screening for trisomy 21",
keywords = "crown-rump length, free ss-hCG, nuchal translucency, PAPP-A, trisomy 21",
author = "Kagan, {K. O.} and M. Hoopmann and A. Baker and M. Huebner and H. Abele and D. Wright",
year = "2012",
doi = "10.1002/uog.11095",
language = "English",
volume = "40",
pages = "135--139",
journal = "ULTRASOUND IN OBSTETRICS & GYNECOLOGY",
issn = "0960-7692",
number = "2",
}