@article{ref1,
title="Suicide by tramadol overdose",
journal="Journal of analytical toxicology",
year="1998",
author="Lusthof, K. J. and Zweipfenning, P. G.",
volume="22",
number="3",
pages="260-260",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0146-4760",
doi="",
url="http://dx.doi.org/"
}