@article{ref1,
title="Are there real differences between tryptans?",
journal="Duodecim: Laaketieteellinen Aikakauskirja",
year="2004",
author="Kallela, Mikko",
volume="120",
number="3",
pages="329-335",
abstract="<p>[Abstract unavailable]</p><p>Language: fi</p>",
language="fi",
issn="0012-7183",
doi="",
url="http://dx.doi.org/"
}