@article{ref1,
title="Pain therapy with opioids. Not a risk in street traffic",
journal="MMW: Fortschritte der Medizin",
year="2002",
author="",
volume="144",
number="15",
pages="63-63",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="1438-3276",
doi="",
url="http://dx.doi.org/"
}