@article{ref1,
title="Hip protectors and hip fractures",
journal="Age and ageing",
year="1998",
author="Jantti, P. O. and Aho, H. J. and Maki-Jokela, P. L. and Heikinheimo, R. J.",
volume="27",
number="6",
pages="758-759",
abstract="Abstract unavailable.",
language="",
issn="0002-0729",
doi="",
url="http://dx.doi.org/"
}