@article{ref1,
title="Opioid deaths or polydrug/multi-cause deaths?",
journal="Drug and alcohol dependence",
year="2015",
author="Erensen, Jennifer G. and Haddox, James D.",
volume="146",
number="",
pages="e272-e272",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0376-8716",
doi="10.1016/j.drugalcdep.2014.09.206",
url="http://dx.doi.org/10.1016/j.drugalcdep.2014.09.206"
}