@article{ref1,
title="Head injury and the risk of Parkinson's disease",
journal="Movement disorders",
year="2012",
author="Morley, James F. and Duda, John E.",
volume="27",
number="13",
pages="1592-1594",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0885-3185",
doi="10.1002/mds.25230",
url="http://dx.doi.org/10.1002/mds.25230"
}