@article{ref1,
title="Drug screening in the workplace: use, abuse and implications",
journal="NIDA research monograph",
year="1989",
author="Grabowski, J. and Silverman, P. B.",
volume="95",
number="",
pages="225-231",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="1046-9516",
doi="",
url="http://dx.doi.org/"
}