@article{ref1,
title="How do we prevent hip fractures?",
journal="Calcified tissue international",
year="1994",
author="Kannus, Pekka and Parkkari, Jari and Sievanen, H.",
volume="54",
number="2",
pages="175-177",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0171-967X",
doi="",
url="http://dx.doi.org/"
}