@article{Morgen2008,
author = {Morgen, Camilla Schmidt and Bjørk, Christina and Andersen, Per Kragh and Mortensen, Laust Hvas and Nybo Andersen, Anne-Marie },
title= {Socioeconomic position and the risk of preterm birth—a study within the Danish National Birth Cohort},
year = {2008},
doi = {10.1093/ije/dyn112},
journal = {International Journal of Epidemiology},
volume = {37},
number = {5},
pages = {1109--1120},
}