@article{ref1,
title="Violence and aggression in psychiatric patients",
journal="Harvard Mental Health Letter",
year="1999",
author="",
volume="15",
number="11",
pages="6-7",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="1057-5022",
doi="",
url="http://dx.doi.org/"
}