@article{ref1,
title="Psychiatric comorbidity in migraine",
journal="Cephalalgia",
year="1998",
author="Breslau, Naomi",
volume="18",
number="Suppl 22",
pages="56-8; discussion 58",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0333-1024",
doi="",
url="http://dx.doi.org/"
}