@article{ref1,
title="The clinical utility of PHQ-9 item 9 for suicide prediction",
journal="Psychiatric services",
year="2016",
author="McCusker, Paul J.",
volume="67",
number="9",
pages="1042-1042",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="1075-2730",
doi="10.1176/appi.ps.670904",
url="http://dx.doi.org/10.1176/appi.ps.670904"
}