@article{ref1,
title="Premenstrual syndrome",
journal="Journal of the British Menopause Society",
year="2002",
author="Andrews, G. and Studd, J.",
volume="8",
number="2",
pages="e78-e78",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="1362-1807",
doi="10.1258/136218002100321613",
url="http://dx.doi.org/10.1258/136218002100321613"
}