@article{2b9bd68cea964191b1ec8bb7a55b990d,
title = "OC15.03: Effects of gestational age at biochemical sampling on first-trimester screening performance for trisomy 18 and 13",
author = "Petersen, {Olav Bj{\o}rn}",
year = "2012",
doi = "10.1002/uog.11319",
language = "English",
volume = "40",
pages = "31--31",
journal = "Ultrasound in obstetrics & gynecology : the official journal of the International Society of Ultrasound in Obstetrics and Gynecology",
issn = "0960-7692",
publisher = "John/Wiley & Sons Ltd",
number = "S1",
note = "22th World Congress on Ultrasound in Obstetrics and Gynecology : ISUOG ; Conference date: 09-09-2012 Through 12-09-2012",
}