@article{ref1,
title="Prevention of bone fractures by exercises",
journal="Nippon Rinsho",
year="2004",
author="Okawa, Tokutaro and Sato, Tetsuya and Koike, Tatsuya",
volume="62",
number="Suppl 2",
pages="602-606",
abstract="<p>[Abstract unavailable]</p><p>Language: ja</p>",
language="ja",
issn="0047-1852",
doi="",
url="http://dx.doi.org/"
}