@article{ref1,
title="Major medical journals will require registration of clinical trials for publication",
journal="Report on medical guidelines and outcomes research",
year="2004",
author="Levenson, Deborah",
volume="15",
number="19",
pages="1-2, 6",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="1050-5636",
doi="",
url="http://dx.doi.org/"
}