@article{ref1,
title="Treatment of osteoporosis with vitamin D",
journal="Osteoporosis international",
year="1997",
author="Kanis, J. A. and McCloskey, E. V. and de Takats, D. and Bernard, J. and Zhang, D. M.",
volume="7",
number="Suppl 3",
pages="S140-6",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0937-941X",
doi="",
url="http://dx.doi.org/"
}