@article{ref1,
title="General legal problems concerning insurance in the evaluation of pre-existing conditions",
journal="Hefte zur Unfallheilkunde",
year="1975",
author="Hymmen, R.",
volume="",
number="121",
pages="261-263",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0085-1469",
doi="",
url="http://dx.doi.org/"
}