@article{ref1,
title="Heroin users seeking methadone treatment",
journal="Medical journal of Australia",
year="1990",
author="",
volume="153",
number="2",
pages="116-116",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0025-729X",
doi="",
url="http://dx.doi.org/"
}