@article{ref1,
title="Injury of an extremity as a risk factor for the development of osteoporosis",
journal="Journal of bone and joint surgery: American volume",
year="1997",
author="Jarvinen, M. and Kannus, Pekka",
volume="79",
number="2",
pages="263-276",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0021-9355",
doi="",
url="http://dx.doi.org/"
}