@article{ref1,
title="Pain, opioids, and suicide mortality in the United States",
journal="Annals of internal medicine",
year="2018",
author="Ilgen, Mark",
volume="169",
number="7",
pages="498-499",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0003-4819",
doi="10.7326/M18-2330",
url="http://dx.doi.org/10.7326/M18-2330"
}