@article{ref1,
title="Violence in Philadelphia emergency departments reflects national trends",
journal="Journal of emergency nursing",
year="1991",
author="Blank, C. A. and Mascitti-Mazur, J. E.",
volume="17",
number="5",
pages="318-321",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0099-1767",
doi="",
url="http://dx.doi.org/"
}