@article{ref1,
title="The importance of observational methods for evaluation of interventions to prevent occupational injuries",
journal="Occupational and environmental medicine",
year="2005",
author="Lipscomb, Hester J.",
volume="62",
number="12",
pages="819-820",
abstract="Abstract unavailable.",
language="",
issn="1351-0711",
doi="10.1136/oem.2005.022228",
url="http://dx.doi.org/10.1136/oem.2005.022228"
}