@article{ref1,
title="Epidemiological review of the mortality of bereavement",
journal="Psychosomatic medicine",
year="1978",
author="Clayton, Paula J.",
volume="40",
number="5",
pages="435-438",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0033-3174",
doi="",
url="http://dx.doi.org/"
}