@article{ref1,
title="Estimating prevalence of problematic drug use: comments on Frischer et al",
journal="Addiction",
year="2002",
author="Corkery, John Martin",
volume="97",
number="3",
pages="359-360",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0965-2140",
doi="",
url="http://dx.doi.org/"
}