@article{ref1,
title="Does high intake of vitamin A pose a risk for osteoporotic fracture?",
journal="JAMA journal of the American Medical Association",
year="2002",
author="Hathcock, John N.",
volume="287",
number="11",
pages="1396-1397",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0098-7484",
doi="",
url="http://dx.doi.org/"
}