@article{ref1,
title="Fitness-for-duty testing",
journal="Occupational health and safety",
year="1998",
author="Perry, R. G.",
volume="67",
number="4",
pages="41-43",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0362-4064",
doi="",
url="http://dx.doi.org/"
}