@article{ref1,
title="Occupational injury, chronic low back pain and return to work",
journal="Public health",
year="1987",
author="Sheikh, K.",
volume="101",
number="6",
pages="417-425",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0033-3506",
doi="",
url="http://dx.doi.org/"
}