@article{ref1,
title="Clinical-behavioral observations of the long-term effects of drug abuse",
journal="NIDA research monograph",
year="1990",
author="Woody, George E. and McLellan, A. T. and O'Brien, C. P.",
volume="101",
number="",
pages="71-85",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="1046-9516",
doi="",
url="http://dx.doi.org/"
}