@article{ref1,
title="Deaths from tramadol and legal highs reach new highs in England and Wales",
journal="BMJ",
year="2013",
author="Hawkes, N.",
volume="347",
number="",
pages="-",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0959-535X",
doi="10.1136/bmj.f5336",
url="http://dx.doi.org/10.1136/bmj.f5336"
}