@article{ref1,
title="Fitness for duty in hazardous occupations: objective vs. subjective criteria",
journal="American journal of industrial medicine",
year="1999",
author="Gochfeld, M.",
volume="36",
number="6",
pages="666-668",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0271-3586",
doi="",
url="http://dx.doi.org/"
}