@article{ref1,
title="Calcium and fracture risk",
journal="American journal of clinical nutrition",
year="2007",
author="Nieves, Jeri W. and Lindsay, R.",
volume="86",
number="6",
pages="1579-1580",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0002-9165",
doi="",
url="http://dx.doi.org/"
}