@article{ref1,
title="Tips for the identification of drug abusers",
journal="New York state journal of medicine",
year="1973",
author="",
volume="73",
number="8",
pages="946-946",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0028-7628",
doi="",
url="http://dx.doi.org/"
}