@article{ref1,
title="Falls and fractures in the elderly people: epidemiology and prevention",
journal="Nippon Ronen Igakkai Zasshi",
year="2006",
author="Kawakami, Osamu and Kato, Y. and Oto, Toshiki",
volume="43",
number="1",
pages="7-18",
abstract="Abstract unavailable.",
language="",
issn="0300-9173",
doi="",
url="http://dx.doi.org/"
}