@article{ref1,
title="Nonurgent emergency department visits--whose definition?",
journal="Annals of emergency medicine",
year="1994",
author="Mitchell, T. A.",
volume="24",
number="5",
pages="961-963",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0196-0644",
doi="",
url="http://dx.doi.org/"
}