@article{ref1,
title="Gun laws in the United States",
journal="Nurse practitioner",
year="2017",
author="",
volume="42",
number="12",
pages="e6-e6",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0361-1817",
doi="10.1097/01.NPR.0000526761.30477.cb",
url="http://dx.doi.org/10.1097/01.NPR.0000526761.30477.cb"
}