@article{ref1,
title="The osteoporosis problem",
journal="Current concepts in nutrition",
year="1977",
author="Avioli, L. V.",
volume="5",
number="",
pages="99-103",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0090-0443",
doi="",
url="http://dx.doi.org/"
}