@article{ref1,
title="Risk factors for osteoporosis in Europe",
journal="Journal of bone and mineral metabolism",
year="2001",
author="Lau, Edith M. C. and Cooper, Colin",
volume="19",
number="3",
pages="142-145",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0914-8779",
doi="",
url="http://dx.doi.org/"
}