@article{ref1,
title="Pre-existing structural defects and severity of compensation back injuries",
journal="Industrial medicine and surgery",
year="1958",
author="Runge, C. F.",
volume="27",
number="5",
pages="249-252",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0019-8536",
doi="",
url="http://dx.doi.org/"
}