@article{ref1,
title="Protection against loss of bone and fracture in postmenopausal women",
journal="Western journal of medicine",
year="1981",
author="Heaney, R. P.",
volume="134",
number="1",
pages="74-76",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0093-0415",
doi="",
url="http://dx.doi.org/"
}