@article{ref1,
title="International collaborative study of osteoporosis and fracture epidemiology",
journal="Clinical orthopaedics and related research",
year="1966",
author="Whedon, G. D.",
volume="45",
number="",
pages="13-15",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0009-921X",
doi="",
url="http://dx.doi.org/"
}