@article{ref1,
title="Bone density measurements and osteoporosis",
journal="Journal of internal medicine",
year="1997",
author="Kanis, J. A.",
volume="241",
number="3",
pages="173-175",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0954-6820",
doi="",
url="http://dx.doi.org/"
}