@article{ref1,
title="Epidemiology of osteoporosis",
journal="Journal of epidemiology and biostatistics",
year="2001",
author="Boyle, P. and Leon, M. E. and Autier, P.",
volume="6",
number="2",
pages="185-192",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="1359-5229",
doi="",
url="http://dx.doi.org/"
}