@article{ref1,
title="Heroin: what's in the mix?",
journal="Annals of emergency medicine",
year="2007",
author="Muller, A. A. and Osterhoudt, Kevin C. and Wingert, William",
volume="50",
number="3",
pages="352-353",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0196-0644",
doi="10.1016/j.annemergmed.2007.03.041",
url="http://dx.doi.org/10.1016/j.annemergmed.2007.03.041"
}