@article{ref1,
title="Zero tolerance of violence",
journal="British journal of psychiatry",
year="2005",
author="Prins, H.",
volume="187",
number="",
pages="490-490",
abstract="Abstract unavailable.",
language="",
issn="0007-1250",
doi="10.1192/bjp.187.5.490",
url="http://dx.doi.org/10.1192/bjp.187.5.490"
}