@article{ref1,
title="Heroin overdose: new directions for research",
journal="Addiction",
year="1999",
author="Zador, Deborah",
volume="94",
number="7",
pages="975-976",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0965-2140",
doi="",
url="http://dx.doi.org/"
}