@article{ref1,
title="Unhappiness and mental disease",
journal="New England journal of medicine",
year="1932",
author="Gregg, Donald",
volume="206",
number="14",
pages="725-727",
abstract="KEYWORDS: Suicide<p /><p>Language: en</p>",
language="en",
issn="0028-4793",
doi="10.1056/NEJM193204072061403",
url="http://dx.doi.org/10.1056/NEJM193204072061403"
}