@article{ref1,
title="Prevention of thromboembolism after hip fracture",
journal="Geriatrics",
year="1973",
author="Lyon, L. J. and Nevins, M. A.",
volume="28",
number="1",
pages="107-110",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0016-867X",
doi="",
url="http://dx.doi.org/"
}