@article{ref1,
title="Medical Research Council Unit for Epidemiological Studies in Psychiatry",
journal="Psychological medicine",
year="1973",
author="Kreitman, N.",
volume="3",
number="2",
pages="251-256",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0033-2917",
doi="",
url="http://dx.doi.org/"
}